CHARLES RIVER ASSOCIATES INC
PRES14A, 2000-12-01
MANAGEMENT CONSULTING SERVICES
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<PAGE>   1

                                  SCHEDULE 14A
                                 (RULE 14a-101)

                    INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION

                   PROXY STATEMENT PURSUANT TO SECTION 14(a)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

Filed by the Registrant    [X]
Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[X] Preliminary Proxy Statement
[ ] Definitive Proxy Statement
[ ] Definitive Additional Materials
[ ] Confidential, for Use of the Commission only (as permitted by Rule
    14a-6(e)(2))

[ ] Soliciting Material Pursuant to Rule 14a-11(c)
    or Rule 14a-12

                     CHARLES RIVER ASSOCIATES INCORPORATED
          ------------------------------------------------------------
                (Name of Registrant as Specified in Its Charter)

                                 NOT APPLICABLE
          ------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[X] No fee required.
[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

   (1) Title of each class of securities to which transaction applies:

   (2) Aggregate number of securities to which transaction applies:

   (3) Per unit price or other underlying value of transaction computed pursuant
       to Exchange Act Rule 0-11 (set forth the amount on which the filing fee
       is calculated and state how it was determined):

   (4) Proposed maximum aggregate value of transaction:

   (5) Total fee paid:

[ ] Fee paid previously with preliminary materials.

[ ] Check box if any part of the fee is offset as provided by Exchange Act Rule
    0-11(a)(2) and identify the filing for which the offsetting fee was paid
    previously. Identify the previous filing by registration statement number,
    or the form or schedule and the date of its filing.

   1) Amount previously paid:

   2) Form, Schedule or Registration Statement no.:

   3) Filing Party:

   4) Date Filed:

                                   * * * * *
<PAGE>   2

[CHARLES RIVER LOGO]
                     CHARLES RIVER ASSOCIATES INCORPORATED

                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                     TO BE HELD ON                ,

     Charles River Associates Incorporated hereby gives notice that it will hold
a special meeting of stockholders at the offices of Foley, Hoag & Eliot LLP, One
Post Office Square, 16th floor, Boston, Massachusetts on                ,
            ,      , beginning at 10:00 A.M., local time, for the following
purposes:

     1.  To consider and vote upon a proposal to amend CRA's 1998 Incentive and
         Nonqualified Stock Option Plan to increase the number of shares of
         common stock that CRA may issue under the plan from 970,000 to
         1,870,000;

     2.  To consider and vote upon a proposal to amend CRA's 1998 Incentive and
         Nonqualified Stock Option Plan to facilitate the granting of options to
         CRA's employees in the United Kingdom; and

     3.  To transact such further business as may properly come before the
         special meeting or any adjournment thereof.

     The board of directors has fixed the close of business on                ,
            , 2000, as the record date for the determination of the stockholders
of CRA entitled to receive notice of, and to vote at, the special meeting and
any adjournment thereof. Only stockholders of record on             , 2000 are
entitled to receive notice of, and to vote at, the special meeting or any
adjournment thereof.

                                          By order of the board of directors,

                                          Peter M. Rosenblum
                                          Clerk

Boston, Massachusetts
            , 2000

                             YOUR VOTE IS IMPORTANT

         PLEASE SIGN AND RETURN THE ENCLOSED PROXY, WHETHER OR NOT YOU
                      PLAN TO ATTEND THE SPECIAL MEETING.
<PAGE>   3

                     CHARLES RIVER ASSOCIATES INCORPORATED
                              200 CLARENDON STREET
                          BOSTON, MASSACHUSETTS 02116
                                 (617) 425-3000

                                PROXY STATEMENT

                        SPECIAL MEETING OF STOCKHOLDERS
                  TO BE HELD ON                ,

     This proxy statement relates to a special meeting of stockholders of
Charles River Associates Incorporated. The special meeting will take place as
follows:

        DATE:               ,

        TIME:   10:00 A.M.

        PLACE:  Foley, Hoag & Eliot LLP
                One Post Office Square
                16th Floor
                Boston, Massachusetts

     CRA's board of directors is soliciting proxies for the special meeting and
any and all adjournments of the special meeting. The shares represented by a
properly signed proxy will be voted in accordance with the stockholder's
directions. If the stockholder does not specify a choice with respect to a
proposal for which the board of directors has made a recommendation, the shares
covered by any signed proxy will be voted as recommended in this proxy
statement. CRA encourages stockholders to vote on all matters to be considered.
Any stockholder may revoke his proxy at any time before it has been exercised.

     CRA is mailing this proxy statement and the enclosed form of proxy to
stockholders on or about             , 2000.

PURPOSE OF THE SPECIAL MEETING

     At the special meeting, CRA will submit the following two proposals to the
stockholders:

        PROPOSAL ONE:  To amend CRA's 1998 Incentive and Nonqualified Stock
                       Option Plan to increase the number of shares of common
                       stock that CRA may issue under the plan from 970,000 to
                       1,870,000; and

        PROPOSAL TWO:  To amend CRA's 1998 Incentive and Nonqualified Stock
                       Option Plan to facilitate the granting of options to
                       CRA's employees in the United Kingdom.

     The board of directors does not intend to present to the special meeting
any business other than the proposals described in this proxy statement, and the
board of directors was not aware, a reasonable time before mailing this proxy
statement to stockholders, of any other business which properly may be presented
for action at the special meeting. If any other business should properly come
before the special meeting, the persons present will have discretionary
authority to vote the shares they own or represent by proxy in accordance with
their judgment.

RECORD DATE

     The board of directors of CRA has fixed the close of business on        ,
            , 2000, as the record date for the special meeting. Only
stockholders of record on that date are entitled to receive notice of the
special meeting and to vote at the special meeting. At the close of business on
the record date, there were issued and outstanding [9,091,523] shares of CRA's
common stock. Each share of common stock outstanding on the record date will be
entitled to cast one vote.

                                        1
<PAGE>   4

QUORUM

     CRA's by-laws provide that a quorum shall consist of a majority in interest
of all shares of common stock issued, outstanding and entitled to vote at the
special meeting. Shares of common stock represented by a properly signed and
returned proxy will be treated as present at the special meeting for purposes of
determining the existence of a quorum at the special meeting. In general,
abstentions (if applicable) and broker "non-votes" (if applicable) are counted
as present or represented for purposes of determining the existence of a quorum
at the special meeting. A "non-vote" occurs when a broker or nominee holding
shares for a beneficial owner does not vote on a proposal because the broker or
nominee does not have discretionary voting power and has not received
instructions from the beneficial owner.

TABULATION OF VOTES

     A majority of the votes properly cast at the special meeting will be
necessary to approve the amendments of CRA's 1998 Incentive and Nonqualified
Stock Option Plan in order to increase the number of shares of common stock that
may be issued under the plan from 970,000 to 1,870,000 (Proposal One) and to
facilitate the granting of options to CRA's employees in the United Kingdom
(Proposal Two). Abstentions and broker "non-votes" will not be included in
calculating the number of votes cast on such proposals.

     CRA's transfer agent, EquiServe, will tabulate the votes at the special
meeting. EquiServe will tabulate separately the vote on each matter submitted to
stockholders.

SOLICITATION OF PROXIES

     No compensation will be paid by any person in connection with the
solicitation of proxies. CRA will reimburse brokers, banks and other nominees
for the out-of-pocket expenses and other reasonable clerical expenses they incur
in obtaining instructions from beneficial owners of the common stock. In
addition to the solicitation by mail, special solicitation of proxies may be
made personally or by telephone, facsimile, courier or e-mail by directors,
officers and employees of CRA. CRA expects that the expense of any such special
solicitation will be nominal. CRA will pay all expenses incurred in connection
with this solicitation.

                                        2
<PAGE>   5

                                  PROPOSAL ONE

                 AMENDING CRA'S 1998 INCENTIVE AND NONQUALIFIED
                 STOCK OPTION PLAN TO INCREASE THE TOTAL NUMBER
                  OF SHARES THAT CRA MAY ISSUE UNDER THE PLAN

     Proposal One concerns amending CRA's 1998 Incentive and Nonqualified Stock
Option Plan in order to increase the number of shares of common stock that CRA
may issue under the plan from 970,000 to 1,870,000.

     In preparation for CRA's initial public offering, the board of directors
adopted the stock option plan on February 20, 1998 and the stockholders approved
the plan on April 9, 1998. In April 1999, the board of directors amended the
plan to provide that options automatically granted under the plan to "outside
directors" will have terms of ten years, rather than five years, which was
approved by the stockholders on June 2, 1999. See "Compensation of Directors and
Executive Officers -- Director Compensation" for the definition of "outside
director" and more information on CRA's automatic option grant program. On
September 13, 2000, the board of directors amended the plan to allow the
transfer of "nonqualified options," which did not require the approval of the
stockholders. See "Summary of the Plan" for the definition of "nonqualified
options." The stock option plan originally provided, and currently provides,
that the total number of shares that CRA may issue under the plan may not exceed
970,000 shares of common stock.

     On           , 2000, the board of directors amended the stock option plan
to increase the number of shares available for the grant of options under the
plan from 970,000 to 1,870,000, subject to adjustment in the event of a stock
split, stock dividend, recapitalization or the like. The board of directors is
submitting this amendment to the stock option plan to the stockholders for
approval. If the stockholders do not approve Proposal One, the total number of
shares that CRA may issue under the plan will remain at 970,000. A majority of
the votes properly cast at the special meeting will be necessary to approve
Proposal One.

     CRA is submitting Proposal One for stockholder approval for two reasons:
(1) to enable CRA to compensate executive officers, outside directors and other
key employees in a fashion that the board of directors believes is beneficial to
CRA and its stockholders; and (2) to comply with the rules of the Nasdaq
National Market. Options constitute an important portion of the overall
compensation of CRA's executive officers, outside directors and key employees.
Nearly all of the 970,000 shares available under the plan have been issued. The
board of directors, including the members of the compensation committee,
believes that CRA will derive substantial benefits from increasing the number of
options that CRA can issue under the plan. The board of directors believes that
the proposed amendment, by enabling CRA to issue additional options under the
plan, will enable CRA to better compete for qualified directors, officers and
employees. The board believes that the proposed amendment will assist CRA to
attract and retain key executives and employees by enabling it to offer
competitive compensation packages. The board of directors believes that options
are essential in attracting and retaining successful employees crucial to the
success of CRA. Accordingly, the board believes increasing the number of
available shares under the plan is necessary to reach CRA's goals of further
aligning the interests of CRA's outside directors, executive officers and key
employees with the interests of the stockholders and to attract and retain key
executives and employees.

     In addition, the Marketplace Rules of the Nasdaq Stock Market require that
CRA, as a Nasdaq National Market issuer, obtain stockholder approval of any
material amendment to a stock option plan under which officers or directors of
CRA may acquire stock of CRA.

     THE BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE FOR THE PROPOSAL TO AMEND
THE 1998 INCENTIVE AND NONQUALIFIED STOCK OPTION PLAN TO INCREASE THE TOTAL
NUMBER OF SHARES OF COMMON STOCK THAT MAY BE ISSUED UNDER THE PLAN FROM 970,000
TO 1,870,000.

                                        3
<PAGE>   6

PURPOSE OF THE PLAN

     The plan is designed to provide additional incentive to directors,
executive officers, key employees and other individuals providing services to
CRA or any parent or subsidiary of CRA. CRA believes that the grant of stock
options under the plan provides individuals with a long-term interest in the
growth and success of CRA. CRA intends that the grant of incentive and
nonqualified stock options provide such additional incentive by giving
individuals the opportunity to acquire a proprietary interest, or increase their
existing proprietary interest, in CRA through the acquisition of shares of
common stock.

SUMMARY OF THE PLAN

     The full text of the plan, as amended with respect to Proposal One, is
printed as Appendix A and should be reviewed by the stockholders before voting.
The following is a summary of the material features of the plan.

  General Information; Number of Shares

     The amendment to the plan that the board of directors approved in
          2000 increased the number of shares of common stock issuable under the
plan to 1,870,000, subject to stockholder approval. Shares of common stock
issued under the plan may be either authorized but unissued shares or treasury
shares. The plan authorizes the grant of options to purchase common stock
intended to qualify as incentive stock options, as defined in Section 422 of the
Internal Revenue Code and the grant of options that do not so qualify, or
nonqualified options. At November 25, 2000, there were outstanding options to
purchase an aggregate of 887,100 shares of common stock.

     The last sales price of the common stock on November 25, 2000, as reported
on the Nasdaq National Market, was $10.625.

  Administration of the Plan

     The plan is administered by the plan administrator, which consists of the
board of directors or, if appointed by the board of directors, a committee
consisting of at least two "disinterested directors," as defined in the plan.
The plan is currently administered by the board of directors of CRA.

     Except as specifically reserved to the board of directors under the terms
of the plan, the plan administrator has full and final authority to operate,
manage and administer the plan on behalf of CRA. Action by the plan
administrator requires the affirmative vote of a majority of all members of the
plan administrator. The plan authorizes the plan administrator to construe and
interpret the plan and the options granted under the plan, to establish, amend
and revoke rules and regulations for the administration of the plan, to make
changes to any outstanding option granted under the plan, and generally, to
exercise the powers and to perform the acts that the plan administrator believes
are necessary or expedient to promote the best interests of CRA with respect to
the plan.

     Except with respect to the non-discretionary option grants to outside
directors described below, the plan administrator selects the persons to whom
options are granted and prescribes the terms, conditions, restrictions, if any,
and provisions of each option (which need not be identical), subject to the
provisions of the plan.

     As of November 25, 2000, ten directors and approximately 350 employees were
eligible to participate in the plan.

     Incentive options under the plan may be granted only to officers and other
employees of CRA or any parent or subsidiary of CRA. Nonqualified options may be
granted to officers or other employees of CRA or any parent or subsidiary of CRA
and to members of the board of directors and consultants or other persons who
provide services to CRA or any parent or subsidiary of CRA, regardless of
whether they are also employees. Options may be granted to outside directors
only as specifically provided by the plan. No participant under the plan may be
granted options with respect to more than 150,000 shares of common

                                        4
<PAGE>   7

stock in any calendar year. Shares of common stock issuable under options that
are forfeited, canceled or otherwise terminated nonetheless count against this
limitation. No incentive option may extend for more than ten years from the date
of grant, or five years in the case of persons holding 10% or more of the total
combined voting power of all classes of stock of CRA or any parent or subsidiary
of CRA.

     The exercise price of incentive options granted under the plan may not be
less than the fair market value of the common stock on the date of grant, or
110% of the fair market value in the case of persons holding 10% or more of the
total combined voting power of all classes of stock of CRA or any parent or
subsidiary of CRA. The exercise price of nonqualified options granted under the
plan may not be less than 85% of the fair market value of the common stock on
the date of grant. The aggregate fair market value, determined at the time of
grant, of shares of common stock issuable pursuant to incentive options which
first become exercisable by an employee in any calendar year may not exceed
$100,000, or such greater amount the Internal Revenue Code or any other
applicable law or regulation may permit.

     Under the plan, each outside director who joins the board of directors will
automatically be granted, upon joining the board of directors, a nonqualified
option to purchase 10,000 shares of common stock at an exercise price equal to
the fair market value of the common stock on the date of grant. The option will
vest in three equal annual installments beginning on the first anniversary of
the date of grant. In addition, each outside director who is re-elected by the
stockholders of CRA at any meeting of stockholders and each outside director
whose term of office does not expire at any annual meeting of stockholders or
special meeting in lieu thereof and who remains an outside director after that
meeting will automatically be granted, immediately following that meeting of
stockholders, a nonqualified option to purchase 5,000 shares of common stock at
an exercise price equal to the fair market value of the common stock on the date
of grant. The option will vest in full on the first anniversary of the date of
grant. The current outside directors of CRA are Drs. Carl Kaysen, Rowland T.
Moriarty and J. Robert S. Prichard, and Mr. William F. Concannon. Nonqualified
options automatically granted to an outside director after CRA's 1999
stockholder meeting will have a term of ten years from the date of grant. All
nonqualified options granted to outside directors before that meeting have terms
of five years.

     The plan administrator may accelerate the time for exercise of all
unexercised and unexpired options or, with proper notice, cancel all outstanding
options in connection with a merger or consolidation in which the voting stock
of CRA before the merger or consolidation does not represent more than 50% of
the voting stock of CRA or the surviving company after the merger or
consolidation, or a liquidation of CRA or a sale or other disposition of
substantially all of the assets of CRA.

     In general, options are not transferable except by will or under the laws
of descent and distribution, and during the holder's lifetime are exercisable
only by the holder. The plan administrator may, in its discretion, permit the
transfer or assignment of a nonqualified option by the option holder for no
consideration to:

     -  any member of the option holder's immediate family;

     -  any trust solely for the benefit of members of the option holder's
        immediate family;

     -  any partnership whose only partners are members of the option holder's
        immediate family; or

     -  any limited liability company or corporate entity whose only members or
        other equity owners are members of the option holder's immediate family.

     "Immediate family" means an option holder's parents, spouse, children and
grandchildren. Other than options granted to non-employees, options generally
may not be exercised after the earliest to occur of:

     -  the expiration of the option;

     -  termination by CRA of the holder's employment with or performance of
        services for CRA, with or without cause;

     -  voluntary termination by the holder of the holder's employment with or
        performance of services for CRA;
                                        5
<PAGE>   8

     -  one year after the holder's death, if the holder's death occurs before
        the expiration of the option and before termination of the holder's
        employment with or performance of services for CRA; and

     -  90 days after the holder's retirement in good standing from CRA for
        reasons of age or disability, if the retirement occurs before the
        expiration of the option.

     The holder of an option may pay the purchase price for the shares subject
to the option with:

     -  cash or a check;

     -  with the consent of the plan administrator, shares of common stock that
        have been owned by the holder for more than six months or were not
        acquired from CRA and that have a fair market value not greater than the
        exercise price for such shares;

     -  with the consent of the plan administrator, cash proceeds derived from
        the sale of a portion of the shares acquired upon exercise;

     -  with the consent of the plan administrator, other consideration that is
        acceptable to the plan administrator and has a fair market value equal
        to the exercise price for such shares; or

     -  with the consent of the plan administrator, any combination of the
        foregoing.

  Federal Income Tax Information with Respect to the Plan

     The holder of a nonqualified option recognizes no income for federal income
tax purposes on the grant of the option. On the exercise of a nonqualified
option, the difference between the fair market value of the common stock on the
exercise date and the option exercise price is treated as compensation to the
holder of the option taxable as ordinary income in the year of exercise. That
fair market value becomes the basis for the underlying shares which will be used
in computing any capital gain or loss upon disposition of the shares.

     Except as described below with respect to the alternative minimum tax, the
holder of an incentive option recognizes no income for federal income tax
purposes on either the grant of the option or the exercise of the option. If the
holder does not dispose of the shares acquired upon exercise of the incentive
option within two years from the date of the grant of the incentive option or
within one year after exercise of the incentive option, any gain realized by the
holder on the subsequent sale of the shares will be treated for federal income
tax purposes as long-term capital gain. If the holder sells the shares before
the expiration of such two-year and one-year periods, which is considered a
"disqualifying disposition," the difference between the lesser of the value of
the shares at the date of exercise or at the date of sale and the exercise price
of the incentive option will be treated as compensation to the holder taxable as
ordinary income, and the excess gain, if any, will be treated as capital gain,
which will be long-term capital gain if the shares are held for more than 12
months. Currently, long-term capital gains are taxed at a maximum rate of 20%
and short-term capital gains are taxed at a maximum rate of 39.6%. In taxable
years beginning after December 31, 2000, the rate of tax applicable to long-term
capital gains in some cases may be reduced below 20% for property held for more
than five years.

     The excess of the fair market value of the common stock over the exercise
price at the time of exercise of an incentive option will constitute an item of
tax preference for purposes of the alternative minimum tax. Taxpayers who incur
the alternative minimum tax are allowed a credit which may be carried forward
indefinitely to be used as a credit against the taxpayer's regular tax liability
in a later year; however, the alternative minimum tax credit cannot reduce the
regular tax below the alternative minimum tax for that carryover year.

     Generally, CRA may deduct on its corporate income tax returns an amount
equal to the amount recognized as ordinary income by the holder in the year in
which the holder recognizes ordinary income upon the exercise of a nonqualified
option or upon a disqualifying disposition of an incentive option.

     The plan is not subject to the provisions of the Employee Retirement Income
Security Act of 1974, nor is the plan qualified under Section 401(a) of the
Internal Revenue Code.
                                        6
<PAGE>   9

  Amendments to the Plan

     The board of directors may modify, revise or terminate the plan at any
time, except that the board of directors must obtain the consent of the
stockholders for any amendment that changes or increases the class of persons
eligible to receive options or the total number of shares issuable under the
plan. In addition, the provisions of the plan relating to the issuance of
options to outside directors may not be amended more than once every six months
except to comply with changes in the Internal Revenue Code, the Employment
Retirement Income Security Act of 1974 or the rules thereunder.

NEW PLAN BENEFITS

     Except for the automatic option grants to outside directors described
above, the grant of options under the plan is within the discretion of the plan
administrator. Accordingly, CRA is unable to determine the dollar value or
number of options that will be received by or allocated to any participant under
the plan, except as described below.

     The following table sets forth information concerning options granted under
the plan since its inception to:

     -  each named executive officer;

     -  all current executive officers, as a group;

     -  all current directors who are not executive officers, as a group; and

     -  all employees who are not executive officers, as a group.

     No person has received or is currently expected to receive five percent or
more of the total number of options available for grant under the plan, and CRA
is not aware that any associate of any executive officer or director has
received options under the plan. Because the grant of options under the plan is
discretionary, the persons and groups listed in the following table may receive
additional options under the plan. Pursuant to the terms of the plan, no person
may receive in any calendar year options to purchase more than 150,000 shares of
common stock.

                            HISTORICAL OPTION GRANTS

               1998 INCENTIVE AND NONQUALIFIED STOCK OPTION PLAN

<TABLE>
<CAPTION>
                                                              NUMBER OF
                                                              SECURITIES
                                                              UNDERLYING
                                                               OPTIONS
NAME AND POSITION                                             GRANTED(#)
-----------------                                             ----------
<S>                                                           <C>
James C. Burrows
  President, Chief Executive Officer and Director...........    23,250
Laurel E. Morrison
  Chief Financial Officer, Vice President of Finance and
  Administration, Treasurer and Director....................    35,000
William B. Burnett
  Vice President............................................     3,500
Firoze E. Katrak
  Vice President............................................        --
All current executive officers, as a group..................    61,750
All current directors who are not executive officers, as a
  group.....................................................    86,400
All employees who are not executive officers, as a group....   738,950
</TABLE>

     As of November 25, 2000, there were outstanding options to purchase an
aggregate of 887,100 shares of common stock under the plan, 1,900 shares of
common stock had been purchased pursuant to the exercise of options granted
under the plan, and there were 81,000 shares of common stock available for the

                                        7
<PAGE>   10

future grant of options under the plan. As of November 25, 2000, the exercise
prices and expiration dates of options outstanding under the plan ranged from
$10.688 to $30.25 per share and from April 23, 2003 to September 13, 2010,
respectively.

     Each of Mr. Burnett and Dr. Katrak ceased to serve as a director and
executive officer of CRA as of April 2000.

     The following table sets forth information concerning the benefits that CRA
can determine will be received by:

     -  each executive officer;

     -  all current executive officers, as a group;

     -  all current directors who are not executive officers, as a group; and

     -  all employees who are not executive officers, as a group.

     The information in the following table is limited to the annual automatic
option grants to outside directors. Except for the automatic option grants to
outside directors, all other option grants are within the discretion of the plan
administrator.

                               NEW PLAN BENEFITS

               1998 INCENTIVE AND NONQUALIFIED STOCK OPTION PLAN

<TABLE>
<CAPTION>
                                                                                 NUMBER OF
                                                                                 SECURITIES
                                                                                 UNDERLYING
                                                                                  OPTIONS
NAME AND POSITION                                             DOLLAR VALUE($)    GRANTED(#)
-----------------                                             ---------------    ----------
<S>                                                           <C>                <C>
James C. Burrows
  President, Chief Executive Officer and Director...........        --                 --
Laurel E. Morrison
  Chief Financial Officer, Vice President of Finance and
  Administration,
  and Treasurer.............................................        --                 --
William B. Burnett
  Vice President............................................        --                 --
Firoze E. Katrak
  Vice President............................................        --                 --
All current executive officers, as a group..................        --                 --
All current directors who are not executive officers, as a
  group.....................................................          (1)          20,000(2)
All employees who are not executive officers, as a group....        --                 --
</TABLE>

---------------
(1) CRA is unable to determine the dollar value of the options to be granted at
    this time. Each option will be granted at an exercise price equal to the
    fair market value of the common stock on the date of grant.

(2) As of             , 2000, CRA had eight directors who were not executive
    officers, four of whom were outside directors as defined in the plan. The
    amount shown in the table represents the aggregate number of shares of
    common stock issuable pursuant to nonqualified options that will be granted
    immediately after each annual meeting of stockholders to four outside
    directors, assuming CRA will have four outside directors who will be
    re-elected as directors of CRA at the annual meeting or whose term will
    continue after the annual meeting. The amount shown does not include 10,000
    shares of common stock issuable pursuant to nonqualified options that will
    be granted to each outside director who joins the board of directors in the
    future.

                                        8
<PAGE>   11

                                  PROPOSAL TWO

                 AMENDING CRA'S 1998 INCENTIVE AND NONQUALIFIED
           STOCK OPTION PLAN TO FACILITATE THE GRANTING OF OPTIONS TO
                     CRA'S EMPLOYEES IN THE UNITED KINGDOM

     Proposal Two concerns amending CRA's 1998 Incentive and Nonqualified Stock
Option Plan to facilitate the granting of options to CRA's employees in the
United Kingdom.

     On             , 2000, the board of directors amended the stock option plan
to add provisions that will facilitate the granting of options to CRA's
employees in the United Kingdom. The board of directors is submitting this
amendment to the stock option plan to the stockholders for approval. If the
stockholders do not approve Proposal Two, CRA will be unable to effectively
grant options to its employees in the United Kingdom. A majority of the votes
properly cast at the special meeting will be necessary to approve Proposal Two.

     CRA is submitting Proposal Two for stockholder approval for two reasons:
(1) to enable CRA to compensate certain key United Kingdom employees in a
fashion that the board of directors believes is beneficial to CRA and its
stockholders; and (2) to comply with the rules of the Nasdaq National Market.
The board of directors believes that the proposed amendment will enable CRA to
further align the interests of its United Kingdom employees with the interests
of its stockholders. The board also believes that the proposed amendment will
assist CRA to attract and retain key United Kingdom employees by enabling it to
offer competitive compensation packages. In hiring its United Kingdom employees,
CRA has indicated the possibility that successful employees may be granted
options and given a direct interest in the future success of CRA.

     In addition, the Marketplace Rules of the Nasdaq Stock Market require that
CRA, as a Nasdaq National Market issuer, obtain stockholder approval of any
material amendment to a stock option plan under which officers or directors of
CRA may acquire stock of CRA.

     THE BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE FOR THE PROPOSAL TO AMEND
THE 1998 INCENTIVE AND NONQUALIFIED STOCK OPTION PLAN TO FACILITATE THE GRANTING
OF OPTIONS TO CRA'S EMPLOYEES IN THE UNITED KINGDOM.

     You do not need to vote for Proposal One in order to vote for Proposal Two.
If the stockholders approve Proposal Two, CRA could use the 81,000 options
remaining under the stock option plan to grant options under the UK addition.

PURPOSE OF THE UNITED KINGDOM ADDITION TO THE PLAN

     The United Kingdom addition to the plan is designed to provide additional
incentive to United Kingdom employees of CRA and Charles River Associates
Limited, CRA's subsidiary in the United Kingdom. If the UK addition is approved
by the stockholders and the UK tax authorities, options granted under the UK
addition will enjoy advantageous tax treatment. CRA believes that the grant of
stock options under the UK addition provides individuals with a long-term
interest in the growth and success of CRA. CRA intends that the grant of stock
options provide such additional incentive by giving individuals the opportunity
to acquire a proprietary interest, or increase their existing proprietary
interest, in CRA through the acquisition of shares of common stock. In addition,
CRA intends that the UK addition assist CRA to attract and retain key United
Kingdom employees.

SUMMARY OF THE UNITED KINGDOM ADDITION TO THE PLAN

     The full text of the UK addition, which is proposed to be added as an
appendix to the 1998 Incentive and Nonqualified Stock Option Plan, is printed as
Appendix B and should be reviewed by the stockholders before voting. The
following is a summary of the material features of the UK addition.

                                        9
<PAGE>   12

  General Information; Number of Shares

     The UK addition authorizes the grant of options to purchase shares of
common stock at a price equal to the fair market value of the common stock on
the date of grant. The UK addition to the plan does not increase the number of
shares issuable under the plan. Options granted to UK directors and employees
are subject to the terms of the stock option plan, except to the extent that the
UK addition modifies those terms.

  Administration of the UK Addition

     The UK addition is administered by the plan administrator as described in
the stock option plan. Except for restrictions imposed by the UK tax authorities
and certain decisions requiring approval of CRA's auditors, the plan
administrator has full and final authority to operate, manage and administer the
UK addition on behalf of CRA.

     The plan administrator selects the persons to whom options are granted and
prescribes the terms, conditions, restrictions, if any, and provisions of each
option subject to the provisions of the UK addition. As of November 25, 2000, 22
employees were eligible to participate in the UK addition.

     All options granted under the UK addition can be exercised at any time
after the earliest to occur of:

     -  the third anniversary of the date of grant;

     -  the date the holder dies, retires due to redundancy, injury or
        disability, or retires from CRA in accordance with the terms of his or
        her contract of employment;

     -  the date the holder ceases to be employed by CRA following certain
        changes in control of CRA or its affiliates as provided in the UK
        addition; or

     -  certain changes in control of CRA or its affiliates as provided in the
        UK addition.

Under the UK addition, options expire on the earliest to occur of:

     -  the tenth anniversary of the date of grant;

     -  90 days following the date the holder ceases to be employed by CRA or an
        affiliate as a result of retirement, redundancy, injury or disability;

     -  the date the holder ceases to be employed by CRA or an affiliate of CRA
        resulting from certain changes in control of CRA or its affiliates as
        provided in the UK addition; or

     -  the date the holder ceases to be employed by CRA or an affiliate in any
        circumstances not provided for above.

Under certain circumstances, the plan administrator may, in its fair and
reasonable discretion, extend the term of the option beyond the termination of
the holder's employment with CRA.

     Options granted under the UK addition are not transferable, although a
holder's legal representative may have the right under law to exercise an option
following the holder's death.

     No options may be granted under the UK addition after ten years following
the date the UK addition is approved.

                                       10
<PAGE>   13

  Tax Information with Respect to the UK Addition

     For UK tax purposes, both the grant of an option and its exercise under the
UK addition will not result in a UK income tax liability to the holder so long
as:

     -  the UK tax authorities approve the UK addition;

     -  the aggregate fair market value, determined at the time of grant, of
        shares of common stock issuable under the UK addition to any employee or
        director does not exceed L30,000 in any one year;

     -  an option is not exercised earlier than three years nor later than ten
        years after the date of grant; and

     -  an option is not exercised within three years of the date the holder
        exercises another option under an executive option plan where relief
        from income tax applied.

     Alternatively, both the grant of an option and its exercise under the UK
addition will not result in an income tax liability to the holder so long as it
is exercised no later than ten years after the date of grant and within one year
after the holder's death.

     If the exercise of an option does not qualify for UK tax relief, the holder
will recognize income for tax purposes at the time of exercise equal to the
difference between the market value of the shares acquired and the sum of the
price paid for the option and the price paid for the shares on exercise of the
option. For capital gains tax purposes, the basis of the shares acquired upon
exercise of an option will be equal to the total of the price paid for the
option, the price paid for the shares on exercise of the option and any
indexation allowance.

  Amendments to the UK Addition

     The plan administrator may modify, revise or terminate the UK addition at
any time, except that the plan administrator must obtain the consent of the
stockholders for amendments that would favor CRA's UK employees by changing,
among other things:

     -  the price of an option;

     -  the number of shares issuable under the UK addition;

     -  who is eligible to receive options; and

     -  the terms of options described in the UK addition.

                                       11
<PAGE>   14

                COMPENSATION OF DIRECTORS AND EXECUTIVE OFFICERS

DIRECTOR COMPENSATION

     CRA pays its non-employee directors an annual fee of $13,000 for their
services as directors, plus $2,000 for each regular board meeting attended and
$1,000 for each special board meeting attended. Directors who are also employees
of CRA do not receive separate fees for their services as directors. See
"Transactions with Related Parties -- Payments to Directors" for information
concerning consulting fees paid by CRA to certain directors for their services
as outside experts to CRA.

     Under CRA's 1998 Incentive and Nonqualified Stock Option Plan, each
"outside director" who is re-elected as a director of CRA or whose term
continues after the annual meeting of stockholders will on the date of the
annual meeting receive a nonqualified option to purchase 5,000 shares of common
stock at an exercise price equal to the fair market value of the common stock on
that date. Each option will vest in full on the first anniversary of the date of
grant and will have a term of ten years. Each person who is first elected an
outside director of CRA will receive on the date of his election a nonqualified
option to purchase 10,000 shares of common stock at an exercise price equal to
the fair market value of the common stock on that date. Each option will vest in
three equal annual installments, commencing on the first anniversary of the date
of grant, and will have a term of ten years. Under the terms of the stock option
plan, an "outside director" is a director who is not an employee of CRA or any
parent or subsidiary of CRA and is not a consultant who provides economic
consulting services to or in conjunction with CRA or any parent or subsidiary of
CRA. Currently, the outside directors of CRA are Drs. Rowland T. Moriarty, Carl
Kaysen and J. Robert S. Prichard and Mr. William F. Concannon.

     In accordance with the terms of the stock option plan, in connection with
CRA's special meeting in lieu of annual meeting of stockholders in June 1999,
each of Drs. Moriarty and Kaysen received a nonqualified option to purchase
5,000 shares of common stock at an exercise price of $21.875 per share and in
connection with CRA's annual meeting of stockholders in April 2000, each of Drs.
Moriarty and Kaysen received a nonqualified option to purchase 5,000 shares of
common stock at an exercise price of $17.188 per share. Upon Dr. Prichard's and
Mr. Concannon's election to the board in June 2000, each received a nonqualified
option to purchase 10,000 shares of common stock at an exercise price of $17.938
per share.

EXECUTIVE COMPENSATION

     Compensation Summary.  The following table provides summary information
concerning the compensation earned by CRA's chief executive officer and other
executive officers for services rendered in all capacities to CRA for the fiscal
years ended November 28, 1998, November 27, 1999 and November 25, 2000. Each of
Mr. Burnett and Dr. Katrak ceased to serve as a director and executive officer
of CRA as of April 2000.

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                                               LONG-TERM
                                                                             COMPENSATION
                                          ANNUAL COMPENSATION                   AWARDS
                              --------------------------------------------    SECURITIES
      NAME AND                                             OTHER ANNUAL       UNDERLYING         ALL OTHER
 PRINCIPAL POSITION    YEAR   SALARY($)   BONUS($)(1)   COMPENSATION($)(2)   OPTIONS(#)(3)   COMPENSATION($)(4)
 ------------------    ----   ---------   -----------   ------------------   -------------   ------------------
<S>                    <C>    <C>         <C>           <C>                  <C>             <C>
James C. Burrows.....  2000   $285,000     $     --            --               13,250            $19,544
  President and Chief  1999    285,000      650,000            --               10,000             19,664
  Executive Officer    1998    285,000      800,000            --                   --             17,779
</TABLE>

                                       12
<PAGE>   15

<TABLE>
<CAPTION>
                                                                               LONG-TERM
                                                                             COMPENSATION
                                          ANNUAL COMPENSATION                   AWARDS
                              --------------------------------------------    SECURITIES
      NAME AND                                             OTHER ANNUAL       UNDERLYING         ALL OTHER
 PRINCIPAL POSITION    YEAR   SALARY($)   BONUS($)(1)   COMPENSATION($)(2)   OPTIONS(#)(3)   COMPENSATION($)(4)
 ------------------    ----   ---------   -----------   ------------------   -------------   ------------------
<S>                    <C>    <C>         <C>           <C>                  <C>             <C>
Laurel E. Morrison...  2000    165,000           --            --               10,000             17,244
  Chief Financial      1999    165,000      185,000            --               13,000             17,364
  Officer, Vice        1998    125,000      175,000            --               12,000             16,164
  President, Finance
  and Administration,
  and Treasurer
Firoze E. Katrak.....  2000    232,500           --            --                   --             18,469
  Vice President       1999    232,500      127,500            --                   --             18,589
                       1998    232,500      500,000            --                   --             16,739
William B. Burnett...  2000    300,000           --            --                   --             20,884
  Vice President       1999    300,000      675,000            --                   --             21,004
                       1998    262,300      875,000            --                3,500             18,184
</TABLE>

---------------
(1) Bonuses for the fiscal year ended November 25, 2000 cannot be determined
    since the amount of bonuses for CRA's executive officers are within the
    discretion of the compensation committee, which has not yet determined the
    bonus amounts.

(2) Other annual compensation in the form of perquisites and other personal
    benefits has been omitted because the aggregate amount of those perquisites
    and other personal benefits was less than $50,000 and constituted less than
    10% of the executive officers' respective total annual salary and bonus.

(3) Represents shares of common stock issuable upon exercise of stock options
    granted under CRA's stock option plan.

(4) Represents contributions by CRA on behalf of the executive officer to CRA's
    Savings & Retirement Plan and Trust and premiums paid by CRA for term life
    insurance for the benefit of the executive officer.

     Option Grants in Last Fiscal Year.  The following table provides
information concerning stock options granted to CRA's chief executive officer
and other executive officers under CRA's stock option plan during the fiscal
year ended November 25, 2000.

                       OPTION GRANTS IN LAST FISCAL YEAR

<TABLE>
<CAPTION>
                                               INDIVIDUAL GRANTS                           POTENTIAL REALIZABLE
                         --------------------------------------------------------------      VALUE AT ASSUMED
                           NUMBER OF                                                       ANNUAL RATE OF STOCK
                          SECURITIES     PERCENT OF TOTAL                                 PRICE APPRECIATION FOR
                          UNDERLYING     OPTIONS GRANTED    EXERCISE                          OPTION TERM(4)
                            OPTIONS      TO EMPLOYEES IN      PRICE                       -----------------------
NAME                     GRANTED(#)(1)    FISCAL YEAR(2)    ($/SH)(3)   EXPIRATION DATE     5%($)        10%($)
----                     -------------   ----------------   ---------   ---------------   ----------   ----------
<S>                      <C>             <C>                <C>         <C>               <C>          <C>
James C. Burrows.......     13,250             4.50%         $19.75     April 25, 2010     $164,574     $417,066
Laurel E. Morrison.....      3,778             1.28%          19.75     April 25, 2010       46,925      118,919
                             6,222             2.11%          19.75     April 25, 2010       77,281      195,848
Firoze E. Katrak.......         --               --              --                 --           --           --
William B. Burnett.....         --               --              --                 --           --           --
</TABLE>

---------------
(1) Represents shares of common stock issuable upon exercise of incentive and
    nonqualified options granted on April 25, 2000 under CRA's stock option
    plan. The option granted to Dr. Burrows vests as follows: 3,542 shares vest
    on April 25, 2001 and 3,236 shares vest on each of April 25, 2002, April 25,
    2003 and April 25, 2004. The incentive option to purchase 3,778 shares
    granted to Ms. Morrison vests as follows: 1,278 shares vest on April 25,
    2003 and 2,500 shares vest on April 25, 2004. The nonqualified option to
    purchase 6,222 shares granted to Ms. Morrison vests as follows: 2,500 shares
    vest on each of April 25, 2001 and April 25, 2002 and 1,222 shares vest on
    April 25, 2003.

                                       13
<PAGE>   16

(2) In fiscal 2000, CRA granted to employees options to purchase an aggregate of
    294,500 shares of common stock under CRA's stock option plan.

(3) All options were granted at fair market value as determined by the board of
    directors, in accordance with CRA's stock option plan, on the date of grant.

(4) Amounts reported in this column represent hypothetical values that may be
    realized upon exercise of the options immediately before the expiration of
    their term, assuming the specified compounded rates of appreciation of the
    price of the common stock over the term of the options. These numbers are
    calculated based on rules promulgated by the Securities and Exchange
    Commission and do not represent CRA's estimate of future stock price growth.
    Actual gains, if any, on stock option exercises and common stock holdings
    depend on the timing of the exercise of the option and the sale of the
    common stock, as well as the future performance of the common stock. The
    rates of appreciation assumed in this table may not be achieved and the
    officers may never receive the amounts reflected. This table does not take
    into account any change in the price of the common stock from the date of
    grant to the current date. The values shown are net of the option exercise
    price, but do not include deductions for taxes or other expenses associated
    with the exercise.

     Fiscal Year-End Option Values.  The following table provides information
concerning stock options held at November 25, 2000 by CRA's chief executive
officer and other executive officers.

                         FISCAL YEAR-END OPTION VALUES

<TABLE>
<CAPTION>
                                   NUMBER OF SECURITIES UNDERLYING             VALUE OF UNEXERCISED
                                        UNEXERCISED OPTIONS AT                 IN-THE-MONEY OPTIONS
                                           FISCAL YEAR-END                   AT FISCAL YEAR-END($)(1)
                                  ----------------------------------    ----------------------------------
NAME                              EXERCISABLE(#)    UNEXERCISABLE(#)    EXERCISABLE($)    UNEXERCISABLE($)
----                              --------------    ----------------    --------------    ----------------
<S>                               <C>               <C>                 <C>               <C>
James C. Burrows................      8,694              14,556               $--                $--
Laurel E. Morrison..............      9,250              25,750               --                 --
Firoze E. Katrak................         --                  --               --                 --
William B. Burnett..............      3,500                  --               --                 --
</TABLE>

---------------
(1) Value is based on $10.625 per share, the last sale price of the common stock
    on November 25, 2000, as reported on the Nasdaq National Market. On that
    date, the value of the common stock was less than the applicable option
    exercise price. Actual gains, if any, on exercise will depend on the value
    of the common stock on the date of the sale of the shares.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

     The compensation committee currently consists of Drs. Franklin M. Fisher,
Carl Kaysen, Rowland T. Moriarty and Steven C. Salop and Mr. William F.
Concannon. Dr. Moriarty is a director and stockholder of NeuCo, Inc., an
affiliate of CRA. For information concerning a stock restriction agreement to
which Drs. Fisher, Kaysen, Moriarty and Salop are parties as well as certain
payments by CRA to Drs. Fisher, Moriarty and Salop, see "Transactions with
Related Parties."

                                       14
<PAGE>   17

                       TRANSACTIONS WITH RELATED PARTIES

STOCK RESTRICTION AGREEMENT

     Each person who was a stockholder of CRA before CRA's initial public
offering is subject to a stock restriction agreement with CRA. The stock
restriction agreement prohibits each pre-IPO stockholder from selling or
otherwise transferring shares of common stock held immediately before the IPO as
follows:

     -  before April 24, 2000, no pre-IPO stockholder could sell any of his or
        her pre-IPO stock except in public offerings;

     -  from April 24, 2000 until April 23, 2003, each pre-IPO stockholder may
        sell up to 50% of his or her pre-IPO stock, less any shares previously
        sold in public offerings;

     -  from April 24, 2003 to April 23, 2005, each pre-IPO stockholder may sell
        up to an additional 20% of his or her pre-IPO stock; and

     -  on and after April 24, 2005, each pre-IPO stockholder may sell, in any
        12-month period, an amount equal to the greater of:

        -  10% of his or her pre-IPO stock, or

        -  one-third of the pre-IPO stock held by him or her on April 24, 2005.

Upon the death or retirement for disability of any pre-IPO stockholder in
accordance with CRA's policies, the foregoing restrictions terminate with
respect to his or her pre-IPO stock. The board of directors has the discretion
to waive any of the restrictions imposed by the stock restriction agreement.

     Under the terms of the stock restriction agreement, if any pre-IPO
stockholder leaves CRA other than for death or retirement for disability in
accordance with CRA's policies, CRA will generally have the following rights to
repurchase his or her pre-IPO stock:

     -  until April 24, 2003, CRA may repurchase up to 50% of his or her pre-IPO
        stock; and

     -  on and after April 24, 2003, CRA may repurchase all of the pre-IPO stock
        that the pre-IPO stockholder will not have already become entitled to
        sell.

The purchase price will be equal to 70% of the fair market value of the
repurchased stock (95% in the case of pre-IPO stockholders who retire after
April 24, 2003), or, if the pre-IPO stockholder competes with CRA, 40% of fair
market value. The purchase price will be payable in three equal annual
installments. The stock restriction agreement will terminate on April 23, 2008
or earlier with the approval of the board of directors of CRA.

PAYMENTS TO DIRECTORS

     CRA has made payments to Drs. Fisher, Salop and Shapiro, all directors of
CRA, for their services as outside experts, including for consulting services to
clients and for the generation of engagements for CRA. In fiscal 2000, CRA paid
Dr. Fisher an aggregate of $836,920. In fiscal 2000, CRA paid Dr. Salop an
aggregate of $1,949,404. In fiscal 2000, CRA paid Dr. Shapiro an aggregate of
$1,207,053. These amounts include payments made to companies wholly owned by
each of the directors.

     As reported in CRA's last proxy statement, in fiscal 2000 (through March
17, 2000), CRA paid Dr. Moriarty, a director of CRA, an aggregate of $317,090
for consulting services, including for consulting services to clients. CRA has
made no other payments to Dr. Moriarty since that time. In addition, CRA has
made certain office space and support services available to Cubex Inc., a
company wholly owned by Dr. Moriarty. The portion of CRA's expenses, including
rent, labor costs and insurance, allocable to the resources made available to
Cubex Inc., net of reimbursements, was $75,017 in fiscal 2000.

                                       15
<PAGE>   18

REPURCHASE OF STOCK

     In May 1995, CRA repurchased 59,800 shares of common stock from each of Dr.
Fisher and Alan R. Willens, a former director of CRA, in each case for a
purchase price equal to the sum of (a) $33,695, payable in three equal annual
installments, (b) $190,872, payable in five annual installments, the last of
which is in the amount of $65,761 and was paid on or about April 1, 2000, and
(c) $2,020, paid in April 1996.

         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     At the close of business on             , 2000, there were issued and
outstanding [9,091,523] shares of common stock entitled to cast [9,091,523]
votes. On             , 2000, the closing price of the common stock as reported
on the Nasdaq National Market was $     per share.

PRINCIPAL STOCKHOLDERS

     The following table provides information regarding the beneficial ownership
of CRA's common stock as of             , 2000 by:

     -  each person known by CRA to be the beneficial owner of more than five
        percent of its common stock;

     -  each of CRA's directors;

     -  each of CRA's executive officers; and

     -  all directors and executive officers of CRA as a group.

     The persons named in this table have sole voting and investment power with
respect to the shares listed, except as otherwise indicated. The inclusion of
shares listed as beneficially owned does not constitute an admission of
beneficial ownership. The total number of shares of common stock outstanding as
of             , 2000 was [9,091,523]. Shares included in the "Right to Acquire"
column consist of shares that may be purchased through the exercise of options
that vest within 60 days of             , 2000.

<TABLE>
<CAPTION>
                                                                      SHARES
                                                                BENEFICIALLY OWNED
                                                              -----------------------
                                                                             RIGHT TO
NAME                                                          OUTSTANDING    ACQUIRE     PERCENT
----                                                          -----------    --------    -------
<S>                                                           <C>            <C>         <C>
Wasatch Advisors, Inc.(1)...................................   1,135,184          --      12.49%
James C. Burrows(2).........................................     476,531       8,694       5.34
Steven C. Salop(3)..........................................     320,737          --       3.53
Franklin M. Fisher..........................................     296,080          --       3.26
Rowland T. Moriarty(4)......................................     305,228      10,000       3.47
William B. Burnett..........................................     167,248       3,500       1.88
Firoze E. Katrak............................................     168,923          --       1.86
Carl Shapiro................................................      63,586      16,400          *
Carl Kaysen.................................................      37,063      10,000          *
Laurel E. Morrison..........................................      14,255       9,250          *
William F. Concannon........................................          --          --         --
J. Robert S. Prichard.......................................          --          --         --
All directors and executive officers as a group (nine
  persons)(5)...............................................   1,513,480      54,344      17.24%
</TABLE>

                                       16
<PAGE>   19

---------------
 *  Less than one percent.

(1) The number of shares beneficially held by Wasatch Advisors, Inc. is based
    solely on information in an amended Schedule 13G filed on June 7, 2000 by
    Wasatch Advisors, Inc. The address for Wasatch Advisors, Inc. is 150 Social
    Hall Avenue, Salt Lake City, Utah 84111.

(2) Includes 71,275 shares held in trust for the benefit of Dr. Burrows and
    certain members of his immediate family. The address for Dr. Burrows is in
    care of CRA, 200 Clarendon Street, Boston, Massachusetts 02116.

(3) Includes 104,814 shares held by Dr. Salop's wife as trustee of two trusts
    for the benefit of certain members of Dr. Salop's immediate family.

(4) Includes 120,897 shares held by trusts for the benefit of Dr. Moriarty and
    certain members of his immediate family, including a trust for which Dr.
    Moriarty's wife acts as trustee.

(5) Excludes shares and options held by Mr. Burnett and Dr. Katrak, two of the
    named executive officers for fiscal 2000, because as of the record date
    neither was an executive officer of CRA.

                             STOCKHOLDER PROPOSALS

     Stockholder proposals for inclusion in CRA's proxy materials relating to
its 2001 annual meeting of stockholders or special meeting in lieu thereof must
be received by CRA at its executive offices no later than November 24, 2000 or,
if the date of that meeting is more than 30 calendar days before or after April
21, 2001, a reasonable time before CRA begins to solicit proxies with respect to
that meeting.

     In addition, CRA's by-laws provide that a stockholder desiring to bring
business before any meeting of stockholders or to nominate any person for
election to the board of directors must give timely written notice to the clerk
of CRA of the business to be conducted in accordance with the procedural
requirements set forth in Articles III or IV of CRA's by-laws, as the case may
be. In the case of a regularly scheduled annual meeting, the written notice must
be delivered to or mailed and received at the principal executive offices of CRA
not less than 60 days nor more than 90 days before the scheduled annual meeting,
must describe the business desired to be brought before the meeting and must
provide specific information about the stockholder, other supporters of the
proposal, their stock ownership and their interest in the proposed business. In
the case of a special meeting in lieu of an annual meeting held in 2001 before
April 21, 2001, if CRA gives less than 70 days' notice or prior public
disclosure of the date of that special meeting, then the notice must be
delivered to or mailed and received at the principal executive offices of CRA
not later than the close of business on the tenth day after the earlier of (1)
the day on which CRA mailed notice of the date of the special meeting and (2)
the day on which CRA publicly disclosed the date of the special meeting. To
bring an item of business before the 2001 annual meeting, a stockholder must
deliver the requisite notice of such item to CRA between January 19, 2001 and
February 19, 2001.

                                       17
<PAGE>   20

                                                                      APPENDIX A

                     CHARLES RIVER ASSOCIATES INCORPORATED

               1998 INCENTIVE AND NONQUALIFIED STOCK OPTION PLAN

SECTION 1. PURPOSE

     This 1998 Incentive and Nonqualified Stock Option Plan (the "Plan") of
Charles River Associates Incorporated (the "Company"), is designed to provide
additional incentive to executives and other key employees of the Company, and
any parent or subsidiary of the Company, and to certain other individuals
providing services to or acting as directors of the Company or any such parent
or subsidiary. The Company intends that this purpose will be effected by the
granting of incentive stock options ("Incentive Stock Options") as defined in
Section 422 of the Internal Revenue Code of 1986, as amended (the "Code"), and
nonqualified stock options ("Nonqualified Options") under the Plan which afford
such executives, key employees or other individuals an opportunity to acquire or
increase their proprietary interest in the Company through the acquisition of
shares of its Common Stock. The Company intends that Incentive Stock Options
issued under the Plan will qualify as "incentive stock options" as defined in
Section 422 of the Code and the terms of the Plan shall be interpreted in
accordance with this intention. As used in the Plan the terms "parent" and
"subsidiary" shall have the respective meanings set forth in Section 424 of the
Code.

SECTION 2. ADMINISTRATION

     2.1 The Plan Administrator.  The Plan shall be administered by the Plan
Administrator (the "Plan Administrator"), which shall consist of the Board of
Directors of the Company (the "Board") or, if appointed by the Board, a
committee consisting of at least two "Disinterested Directors." As used herein,
the term Disinterested Director means any director of the Company who (i) is not
a current employee of the Company or a member of an "affiliated group," as such
term is defined in Section 1504(a) of the Code, which includes the Company (an
"Affiliate"), (ii) is not a former employee of the Company or any Affiliate who
receives compensation for prior services (other than benefits under a
tax-qualified retirement plan) during the Company's or any Affiliate's taxable
year (iii) has not been an officer of the Company or any Affiliate; and (iv)
does not receive remuneration from the Company or any Affiliate, either directly
or indirectly, in any capacity other than as a director. If the Plan is not
administered by the Board, none of the members of the Plan Administrator shall
be an officer or other employee of the Company. It is the intention of the
Company that the Plan, if not administered by the Board, shall be administered
by a committee having two or more "Non-Employee Directors" within the meaning of
Rule 16b-3 under the Securities Exchange Act of 1934, as amended (the "1934
Act"), but the authority and validity of any act taken or not taken by the Plan
Administrator shall not be affected if any person administering the Plan is not
a Non-Employee Director. Except as specifically reserved to the Board under the
terms of the Plan, the Plan Administrator shall have full and final authority to
operate, manage and administer the Plan on behalf of the Company. Action by the
Plan Administrator shall require the affirmative vote of a majority of all
members thereof.

     2.2 Powers of the Plan Administrator.  Subject to the terms and conditions
of the Plan, the Plan Administrator shall have the power:

          (a) To determine from time to time the persons eligible to receive
     options and the options to be granted to such persons under the Plan and to
     prescribe the terms, conditions, restrictions, if any, and provisions
     (which need not be identical) of each option granted under the Plan to such
     persons;

          (b) To construe and interpret the Plan and options granted thereunder
     and to establish, amend, and revoke rules and regulations for
     administration of the Plan. In this connection, the Plan Administrator may
     correct any defect or supply any omission, or reconcile any inconsistency
     in the Plan, or in any option agreement, in the manner and to the extent it
     shall deem necessary or

                                       A-1
<PAGE>   21

     expedient to make the Plan fully effective. All decisions and
     determinations by the Plan Administrator in the exercise of this power
     shall be final and binding upon the Company and optionees;

          (c) To make, in its sole discretion, changes to any outstanding option
     granted under the Plan, including: (i) to reduce the exercise price, (ii)
     to accelerate the vesting schedule or (iii) to extend the expiration date;
     and

          (d) Generally, to exercise such powers and to perform such acts as are
     deemed necessary or expedient to promote the best interests of the Company
     with respect to the Plan.

SECTION 3. STOCK

     3.1 Stock to be Issued.  The stock subject to the options granted under the
Plan shall be shares of the Company's authorized but unissued common stock,
without par value (the "Common Stock"), or shares of the Company's Common Stock
held in treasury. The total number of shares that may be issued pursuant to
options granted under the Plan shall not exceed an aggregate of 1,870,000 shares
of Common Stock; provided, however, that the class and aggregate number of
shares which may be subject to options granted under the Plan shall be subject
to adjustment as provided in Section 8 hereof.

     3.2 Expiration, Cancellation or Termination of Option.  Whenever any
outstanding option under the Plan expires, is cancelled or is otherwise
terminated (other than by exercise), the shares of Common Stock allocable to the
unexercised portion of such option may again be the subject of options under the
Plan.

     3.3 Limitation on Grants.  In no event may any Plan participant be granted
options with respect to more than 150,000 shares of Common Stock in any calendar
year. The number of shares of Common Stock issuable pursuant to an option
granted to a Plan participant in a calendar year that is subsequently forfeited,
cancelled or otherwise terminated shall continue to count toward the foregoing
limitation in such calendar year. In addition, if the exercise price of an
option is subsequently reduced, the transaction shall be deemed a cancellation
of the original option and the grant of a new one so that both transactions
shall count toward the maximum shares issuable in the calendar year of each
respective transaction.

SECTION 4. ELIGIBILITY

     4.1 Persons Eligible.  Incentive Stock Options under the Plan may be
granted only to officers and other employees of the Company or any parent or
subsidiary of the Company. Nonqualified Options may be granted to officers or
other employees of the Company or any parent or subsidiary of the Company, and
to members of the Board and consultants or other persons who render services to
the Company or any such parent or subsidiary (regardless of whether they are
also employees), provided, however, that options may be granted to members of
the Board who are neither employees of the Company or any such parent or
subsidiary nor consultants who provide economic consulting services to or in
conjunction with the Company or any such parent or subsidiary ("Outside
Directors") only as provided in Section 4.4.

     4.2 Greater-Than-Ten-Percent Stockholders.  Except as may otherwise be
permitted by the Code or other applicable law or regulation, no Incentive Stock
Option shall be granted to an individual who, at the time the option is granted,
owns (including ownership attributed pursuant to Section 424(d) of the Code)
more than ten percent of the total combined voting power of all classes of stock
of the Company or any parent or subsidiary (a "greater-than-ten-percent
stockholder"), unless such Incentive Stock Option provides that (i) the purchase
price per share shall not be less than one hundred ten percent of the fair
market value of the Common Stock at the time such option is granted, and (ii)
that such option shall not be exercisable to any extent after the expiration of
five years from the date it is granted.

     4.3 Maximum Aggregate Fair Market Value.  The aggregate fair market value
(determined at the time the option is granted) of the Common Stock with respect
to which Incentive Stock Options are exercisable for the first time by any
optionee during any calendar year (under the Plan and any other plans of the
Company or any parent or subsidiary for the issuance of incentive stock options)
shall not exceed $100,000 (or such greater amount as may from time to time be
permitted with respect to incentive stock
                                       A-2
<PAGE>   22

options by the Code or any other applicable law or regulation). Any option
granted in excess of the foregoing limitation shall be specifically designated
as being a Nonqualified Option.

     4.4 Option Grants to Outside Directors.

          (a) Grant of Options Upon Election to Board.  Each Outside Director
     joining the Board at or subsequent to the meeting of the Company's
     stockholders at which the Plan is approved (the "Approval Meeting") shall
     automatically be granted, upon such Outside Director so joining the Board,
     an initial Nonqualified Option to purchase 10,000 shares of Common Stock.
     Such Nonqualified Option shall vest and become exercisable in three equal
     annual installments cumulatively beginning on the first anniversary of the
     date of grant.

          (b) Grant of Options Upon Re-Election to Board or Continuation on the
     Board.  Each Outside Director who shall be re-elected by the stockholders
     of the Company to the Board at or subsequent to the Approval Meeting shall
     automatically be granted, immediately following the meeting of stockholders
     at which such Outside Director shall be re-elected, a Nonqualified Option
     to purchase 5,000 shares of Common Stock. In addition, each Outside
     Director whose term of office shall not expire at any annual meeting of
     stockholders or special meeting in lieu thereof subsequent to the Approval
     Meeting and who shall remain an Outside Director after such meeting shall
     automatically be granted, immediately following such meeting, a
     Nonqualified Option to purchase 5,000 shares of Common Stock. Each
     Nonqualified Option described in this Section 4.4(b) shall vest and become
     exercisable in full on the first anniversary of the date of grant.

          (c) Purchase Price.  The purchase price per share of Common Stock
     under each Nonqualified Option granted pursuant to this Section 4.4 shall
     be equal to the fair market value of the Common Stock on the date the
     Nonqualified Option is granted, such fair market value to be determined in
     accordance with the provisions of Section 6.3.

          (d) Expiration.  Each Nonqualified Option granted to an Outside
     Director under this Section 4.4 shall expire on the fifth anniversary of
     the date of grant with respect to all Nonqualified Options so granted prior
     to the date of the approval of this Plan by the Company's stockholders in
     1999 and the tenth anniversary of the date of grant with respect to all
     other Nonqualified Options so granted.

SECTION 5. TERMINATION OF EMPLOYMENT OR DEATH OF OPTIONEE

     5.1 Termination of Employment.  Except as may be otherwise expressly
provided herein, options shall terminate on the earlier of:

          (a) the date of expiration thereof; or

          (b) immediately upon the termination of the optionee's employment with
     or performance of services for the Company (or any parent or subsidiary of
     the Company) by the Company (or any such parent or subsidiary) for cause
     (as determined by the Company or such parent or subsidiary), without cause
     or voluntarily by the optionee;

provided, however, that Nonqualified Options granted to persons who are not
employees of the Company (or any parent or subsidiary of the Company) need not,
unless the Plan Administrator determines otherwise, be subject to the provisions
set forth in clause (b) above.

     An employment relationship between the Company (or any parent or subsidiary
of the Company) and the optionee shall be deemed to exist during any period in
which the optionee is employed by the Company (or any such parent or
subsidiary). Whether authorized leave of absence, or absence on military or
government service, shall constitute termination of the employment relationship
between the Company (or any parent or subsidiary of the Company) and the
optionee shall be determined by the Plan Administrator at the time thereof.

     As used herein, "cause" shall mean (x) any material breach by the optionee
of any agreement to which the optionee and the Company (or any parent or
subsidiary of the Company) are both parties,

                                       A-3
<PAGE>   23

(y) any act or omission to act by the optionee which may have a material and
adverse effect on the business of the Company (or any such parent or subsidiary)
or on the optionee's ability to perform services for the Company (or any such
parent or subsidiary), including, without limitation, the commission of any
crime (other than ordinary traffic violations), or (z) any material misconduct
or material neglect of duties by the optionee in connection with the business or
affairs of the Company (or any such parent or subsidiary) or any affiliate of
the Company (or any such parent or subsidiary).

     5.2 Death or Retirement of Optionee.  In the event of the death of the
holder of an option that is subject to clause (b) of Section 5.1 above prior to
termination of the optionee's employment with or performance of services for the
Company (or any parent or subsidiary of the Company) and before the date of
expiration of such option, such option shall terminate on the earlier of such
date of expiration or one year following the date of such death. After the death
of the optionee, his executors, administrators or any person or persons to whom
his option may be transferred by will or by the laws of descent and distribution
shall have the right, at any time prior to such termination, to exercise the
option to the extent the optionee was entitled to exercise such option at the
time of his death.

     If, before the date of the expiration of an option that is subject to
clause (b) of Section 5.1 above, the optionee shall be retired in good standing
from the Company for reasons of age or disability under the then established
rules of the Company, the option shall terminate on the earlier of such date of
expiration or ninety (90) days after the date of such retirement. In the event
of such retirement, the optionee shall have the right prior to the termination
of such option to exercise the option to the extent to which he was entitled to
exercise such option immediately prior to such retirement.

SECTION 6. TERMS OF THE OPTION AGREEMENTS

     Each option agreement shall be in writing and shall contain such terms,
conditions, restrictions, if any, and provisions as the Plan Administrator shall
from time to time deem appropriate. Such provisions or conditions may include,
without limitation, restrictions on transfer, repurchase rights, or such other
provisions as shall be determined by the Plan Administrator; provided, however,
that such additional provisions shall not be inconsistent with any other term or
condition of the Plan and such additional provisions shall not cause any
Incentive Stock Option granted under the Plan to fail to qualify as an incentive
stock option within the meaning of Section 422 of the Code.

     Option agreements need not be identical, but each option agreement by
appropriate language shall include the substance of all of the following
provisions:

          6.1 Expiration of Option.  Notwithstanding any other provision of the
     Plan or of any option agreement, each option shall expire on the date
     specified in the option agreement, which date shall not, in the case of an
     Incentive Stock Option, be later than the tenth anniversary (fifth
     anniversary in the case of a greater-than-ten-percent stockholder) of the
     date on which the option was granted or as specified in Section 5 of this
     Plan.

          6.2 Exercise.  Each option may be exercised, so long as it is valid
     and outstanding, from time to time in part or as a whole, subject to any
     limitations with respect to the number of shares for which the option may
     be exercised at a particular time and to such other conditions as the Plan
     Administrator in its discretion may specify upon granting the option.

          6.3 Purchase Price.  The purchase price per share under each option
     shall be determined by the Plan Administrator at the time the option is
     granted; provided, however, that the option price of any Incentive Stock
     Option shall not, unless otherwise permitted by the Code or other
     applicable law or regulation, be less than the fair market value of the
     Common Stock on the date the option is granted (110% of the fair market
     value in the case of a greater-than-ten-percent stockholder) and the option
     price of any Nonqualified Option shall not be less than 85% of the fair
     market value of the Common Stock on the date the option is granted. For the
     purpose of the Plan the fair market value of the Common Stock shall be the
     closing price per share on the date of grant of the option as reported by a
     nationally recognized stock exchange, or, if the Common Stock is not listed
     on such an exchange, as

                                       A-4
<PAGE>   24

     reported by the National Association of Securities Dealers Automated
     Quotation System ("Nasdaq") National Market System or, if the Common Stock
     is not listed on the Nasdaq National Market System, the mean of the bid and
     asked prices per share on the date of grant of the option or, if the Common
     Stock is not traded over-the-counter, the fair market value as determined
     by the Plan Administrator.

          6.4 Transferability of Options.  Options shall not be transferable by
     the optionee otherwise than by will or under the laws of descent and
     distribution, and shall be exercisable, during his lifetime, only by the
     optionee. Notwithstanding the foregoing, the Plan Administrator may, in its
     sole discretion, permit the transfer or assignment of a Nonqualified Option
     by the original optionee for no consideration to: (i) any member of the
     optionee's Immediate Family; (ii) any trust solely for the benefit of
     members of the optionee's Immediate Family; (iii) any partnership whose
     only partners are members of the optionee's Immediate Family; or (iv) any
     limited liability company or corporate entity whose only members or other
     equity owners are members of the optionee's Immediate Family. For purposes
     of this Section 6.4, "Immediate Family" means an optionee's parents,
     spouse, children and grandchildren. Nothing contained in this Section 6.4
     shall be construed to require the Plan Administrator to give its approval
     to any transfer or assignment of any Nonqualified Option or portion
     thereof, and approval to transfer or assign any Nonqualified Option or
     portion thereof does not mean that such approval will be given with respect
     to any other Nonqualified Option or portion thereof. The transferee or
     assignee of any Nonqualified Option shall be subject to all of the terms
     and conditions applicable to such Nonqualified Option immediately prior to
     the transfer or assignment and shall be subject to any conditions
     prescribed by the Plan Administrator with respect to such Nonqualified
     Option. In particular, and without limiting the generality of the
     foregoing, the termination of employment, retirement or death of the
     original optionee shall continue to determine the term and time for
     exercise of such Nonqualified Option for purposes of Sections 5.1 and 5.2
     above.

          6.5 Rights of Optionees.  No optionee shall be deemed for any purpose
     to be the owner of any shares of Common Stock subject to any option unless
     and until the option shall have been exercised pursuant to the terms
     thereof, and the Company shall have issued and delivered certificates
     representing such shares to the optionee.

          6.6 Certain Rights of the Company.  The Plan Administrator may in its
     discretion provide upon the grant of any option hereunder that the Company
     shall have an option to repurchase upon such terms and conditions as
     determined by the Plan Administrator all or any number of shares purchased
     upon exercise of such option or a right of first refusal in connection with
     subsequent transfer of any or all of such shares. The repurchase price per
     share payable by the Company shall be such amount or be determined by such
     formula as is fixed by the Plan Administrator at the time the option for
     the shares subject to repurchase is granted. In the event the Plan
     Administrator shall grant options subject to the Company's repurchase
     option or right of first refusal, the certificates representing the shares
     purchased pursuant to such option shall carry a legend satisfactory to
     counsel for the Company referring to the Company's repurchase option or
     right of first refusal.

          6.7 "Lockup" Agreement.  The Plan Administrator may in its discretion
     specify upon granting an option that upon request of the Company or the
     underwriters managing any underwritten offering of the Company's
     securities, the optionee shall agree in writing that for a period of time
     (not to exceed 180 days) from the effective date of any registration of
     securities of the Company, the optionee will not sell, make any short sale
     of, loan, grant any option for the purchase of, or otherwise dispose of any
     shares issued pursuant to the exercise of such option, without the prior
     written consent of the Company or such underwriters, as the case may be.

SECTION 7. METHOD OF EXERCISE; PAYMENT OF PURCHASE PRICE

     7.1 Method of Exercise.  Any option granted under the Plan may be exercised
by the optionee by delivering to the Company on any business day a written
notice specifying the number of shares of

                                       A-5
<PAGE>   25

Common Stock the optionee then desires to purchase and specifying the address to
which the certificates for such shares are to be mailed (the "Notice"),
accompanied by payment for such shares.

     7.2 Payment of Purchase Price.  Payment for the shares of Common Stock
purchased pursuant to the exercise of an option shall be made either by (i) cash
or check equal to the option price for the number of shares specified in the
Notice, or (ii) with the consent of the Plan Administrator, other shares of
Common Stock which (a) either have been owned by the optionee for more than six
(6) months on the date of surrender or were not acquired, directly or
indirectly, from the Company, and (b) have a fair market value on the date of
surrender not greater than the aggregate option price of the shares as to which
such option shall be exercised, (iii) with the consent of the Plan
Administrator, delivery of such documentation as the Plan Administrator and the
broker, if applicable, shall require to effect an exercise of the option and
delivery to the Company of the sale or loan proceeds required to pay the option
price, (iv) with the consent of the Plan Administrator, such other consideration
which is acceptable to the Plan Administrator and which has a fair market value
equal to the option price of such shares, or (v) with the consent of the Plan
Administrator, a combination of (i), (ii), (iii) or (iv). For the purpose of the
preceding sentence, the fair market value per share of Common Stock so delivered
to the Company shall be determined in the manner specified in Section 6.3. As
promptly as practicable after receipt of the Notice and accompanying payment,
the Company shall deliver to the optionee certificates for the number of shares
with respect to which such option has been so exercised, issued in the
optionee's name; provided, however, that such delivery shall be deemed effected
for all purposes when the Company or a stock transfer agent of the Company shall
have deposited such certificates in the United States mail, addressed to the
optionee, at the address specified in the Notice.

SECTION 8. CHANGES IN COMPANY'S CAPITAL STRUCTURE

     8.1 Rights of Company.  The existence of outstanding options shall not
affect in any way the right or power of the Company or its stockholders to make
or authorize, without limitation, any or all adjustments, recapitalizations,
reorganizations or other changes in the Company's capital structure or its
business, or any merger or consolidation of the Company, or any issue of Common
Stock, or any issue of bonds, debentures, preferred or prior preference stock or
other capital stock ahead of or affecting the Common Stock or the rights
thereof, or the dissolution or liquidation of the Company, or any sale or
transfer of all or any part of its assets or business, or any other corporate
act or proceeding, whether of a similar character or otherwise.

     8.2 Recapitalizations, Stock Splits and Dividends.  If the Company shall
effect a subdivision or consolidation of shares or other capital readjustment,
the payment of a stock dividend, or other increase or reduction of the number of
shares of the Common Stock outstanding, in any such case without receiving
compensation therefor in money, services or property, then (i) the number,
class, and price per share of shares of stock subject to outstanding options
hereunder shall be appropriately adjusted in such a manner as to entitle an
optionee to receive upon exercise of an option, for the same aggregate cash
consideration, the same total number and class of shares as he would have
received as a result of the event requiring the adjustment had he exercised his
option in full immediately prior to such event; (ii) the number and class of
shares with respect to which options may be granted under the Plan; and (iii)
the number and class of shares set forth in Sections 3.3 and 4.4, shall be
adjusted by substituting for the total number of shares of Common Stock then
reserved for issuance under the Plan that number and class of shares of stock
that the owner of an equal number of outstanding shares of Common Stock
immediately prior to the event requiring adjustment would own as the result of
such event.

     8.3 Merger without Change of Control.  After a merger of one or more
corporations with or into the Company or after a consolidation of the Company
and one or more corporations in which the stockholders of the Company
immediately prior to such merger or consolidation own after such merger or
consolidation shares representing at least fifty percent (50%) of the voting
power of the Company or the surviving or resulting corporation, as the case may
be, each holder of an outstanding option shall, at no additional cost, be
entitled upon exercise of such option to receive in lieu of the shares of Common
Stock as to which such option was exercisable immediately prior to such event,
the number and class of shares of stock or
                                       A-6
<PAGE>   26

other securities, cash or property (including, without limitation, shares of
stock or other securities of another corporation or Common Stock) to which such
holder would have been entitled pursuant to the terms of the agreement of merger
or consolidation if, immediately prior to such merger or consolidation, such
holder had been the holder of record of a number of shares of Common Stock equal
to the number of shares for which such option shall be so exercised.

     8.4 Change of Control.  If the Company is merged with or into or
consolidated with another corporation, other than a merger or consolidation
which would result in the voting securities of the Company outstanding
immediately prior thereto continuing to represent (either by remaining
outstanding or by being converted into voting securities of the surviving
entity) more than fifty percent (50%) of the combined voting power of the voting
securities of the Company or such surviving entity outstanding immediately after
such merger or consolidation; or if the Company is liquidated, or sells or
otherwise disposes of substantially all of its assets to another corporation
while unexercised options remain outstanding under the Plan, then in such event
either:

          (a) subject to the provisions of clause (c) below, after the effective
     date of such merger, consolidation, liquidation, sale or disposition, as
     the case may be, each holder of an outstanding option shall be entitled,
     upon exercise of such option, to receive, in lieu of the shares of Common
     Stock as to which such option was exercisable immediately prior to such
     event, the number and class of shares of stock or other securities, cash or
     property (including, without limitation, shares of stock or other
     securities of another corporation or common stock) to which such holder
     would have been entitled pursuant to the terms of the merger,
     consolidation, liquidation, sale or disposition if, immediately prior to
     such event, such holder had been the holder of a number of shares of Common
     Stock equal to the number of shares as to which such option shall be so
     exercised;

          (b) the Plan Administrator may accelerate the time for exercise of
     some or all unexercised and unexpired options so that from and after a date
     prior to the effective date of such merger, consolidation, liquidation,
     sale or disposition, as the case may be, specified by the Plan
     Administrator such accelerated options shall be exercisable in full; or

          (c) all outstanding options may be canceled by the Plan Administrator
     as of the effective date of any such merger, consolidation, liquidation,
     sale or disposition provided that (x) notice of such cancellation shall be
     given to each holder of an option and (y) each holder of an option shall
     have the right to exercise such option to the extent that the same is then
     exercisable or, if the Plan Administrator shall have accelerated the time
     for exercise of all unexercised and unexpired options, in full during the
     10-day period preceding the effective date of such merger, consolidation,
     liquidation, sale or disposition.

     8.5 Adjustments to Common Stock Subject to Options.  Except as hereinbefore
expressly provided, the issue by the Company of shares of stock of any class, or
securities convertible into shares of stock of any class, for cash or property,
or for labor or services, either upon direct sale or upon the exercise of rights
or warrants to subscribe therefor, or upon conversion of shares or obligations
of the Company convertible into such shares or other securities, shall not
affect, and no adjustment by reason thereof shall be made with respect to, the
number or price of shares of Common Stock then subject to outstanding options.

     8.6 Miscellaneous.  Adjustments under this Section 8 shall be determined by
the Plan Administrator, and such determinations shall be conclusive. No
fractional shares of Common Stock shall be issued under the Plan on account of
any adjustment specified above.

SECTION 9. GENERAL RESTRICTIONS

     9.1 Investment Representations.  The Company may require any person to whom
an option is granted, as a condition of exercising such option, to give written
assurances in substance and form satisfactory to the Company to the effect that
such person is acquiring the Common Stock subject to the option for his own
account for investment and not with any present intention of selling or
otherwise

                                       A-7
<PAGE>   27

distributing the same, and to such other effects as the Company deems necessary
or appropriate in order to comply with federal and applicable state securities
laws.

     9.2 Compliance with Securities Laws.  The Company shall not be required to
sell or issue any shares under any option if the issuance of such shares shall
constitute a violation by the optionee or by the Company of any provision of any
law or regulation of any governmental authority. In addition, in connection with
the Securities Act of 1933, as now in effect or hereafter amended (the "Act"),
upon exercise of any option, the Company shall not be required to issue such
shares unless the Plan Administrator has received evidence satisfactory to it to
the effect that the holder of such option will not transfer such shares except
pursuant to a registration statement in effect under such Act or unless an
opinion of counsel satisfactory to the Company has been received by the Company
to the effect that such registration is not required. Any determination in this
connection by the Plan Administrator shall be final, binding and conclusive. In
the event the shares issuable on exercise of an option are not registered under
the Act, the Company may imprint upon any certificate representing shares so
issued the following legend or any other legend which counsel for the Company
considers necessary or advisable to comply with the Act and with applicable
state securities laws:

    The shares of stock represented by this certificate have not been registered
    under the Securities Act of 1933 or under the securities laws of any State
    and may not be pledged, hypothecated, sold or otherwise transferred except
    upon such registration or upon receipt by the Corporation of an opinion of
    counsel satisfactory to the Corporation, in form and substance satisfactory
    to the Corporation, that registration is not required for such sale or
    transfer.

     The Company may, but shall in no event be obligated to, register any
securities covered hereby pursuant to the Act; and in the event any shares are
so registered the Company may remove any legend on certificates representing
such shares. The Company shall not be obligated to take any other affirmative
action in order to cause the exercise of an option or the issuance of shares
pursuant thereto to comply with any law or regulation of any governmental
authority.

     9.3 Employment Obligation.  The granting of any option shall not impose
upon the Company (or any parent or subsidiary of the Company) any obligation to
employ or continue to employ any optionee; and the right of the Company (or any
such parent or subsidiary) to terminate the employment of any officer or other
employee shall not be diminished or affected by reason of the fact that an
option has been granted to him/her.

     9.4 Withholding Tax.  Whenever under the Plan shares of Common Stock are to
be delivered upon exercise of an option, the Company shall be entitled to
require as a condition of delivery that the optionee remit an amount sufficient
to satisfy all federal, state and other governmental withholding tax
requirements related thereto.

SECTION 10. AMENDMENT OR TERMINATION OF THE PLAN

     The Board of Directors may modify, revise or terminate this Plan at any
time and from time to time, except that (i) the class of persons eligible to
receive options and the aggregate number of shares issuable pursuant to this
Plan shall not be changed or increased, other than by operation of Section 8
hereof, without the consent of the stockholders of the Company and (ii) the
provisions of Section 4.4 shall not be amended more than once every six (6)
months, other than to comport with changes in the Code, the Employee Retirement
Income Security Act of 1974, or the rules thereunder.

SECTION 11. NONEXCLUSIVITY OF THE PLAN

     Neither the adoption of the Plan by the Board of Directors nor the
submission of the Plan to the stockholders of the Company for approval shall be
construed as creating any limitations on the power of the Board of Directors to
adopt such other incentive arrangements as it may deem desirable, including,
without limitation, the granting of stock options otherwise than under the Plan,
and such arrangements may be either applicable generally or only in specific
cases.

                                       A-8
<PAGE>   28

SECTION 12. EFFECTIVE DATE AND DURATION OF PLAN

     The Plan shall become effective upon its adoption by the Board of
Directors. No option may be granted under the Plan after the tenth anniversary
of the effective date. The Plan shall terminate (i) when the total amount of
Common Stock with respect to which options may be granted shall have been issued
upon the exercise of options or (ii) by action of the Board of Directors
pursuant to Section 10 hereof, whichever shall first occur.

                                * * * * * * * *

                                       A-9
<PAGE>   29

                                                                      APPENDIX B

     This Appendix constitutes the UK Approved Part of the Charles River
Associates Incorporated 1998 Incentive and Nonqualified Stock Option Plan. The
terms of the UK Approved Part are as follows:

1. INTERPRETATION

     (1) The following words and expressions have the following meanings except
where the context otherwise requires:

          "ACQUISITION PRICE" the price, as determined by the Plan
     Administrator, at which each Share subject to an Option may be acquired on
     the exercise of that Option, which must not be less than the Market Value
     of a Share at the Date of Grant or if the Option relates to unissued
     Shares, its nominal value, if greater.

          The Acquisition Price may be varied under Rule 11 and, if Rule 13 has
     been applied, the "ACQUISITION PRICE" shall be the price for the
     acquisition of a share in the company whose shares are scheme shares
     determined under Rule 13;

          "APPROVAL" approval of the UK Approved Part as a share option scheme
     under Schedule 9 of the ICTA;

          "APPROVED PART" the UK Approved Section of the Plan, in its present
     form, as from time to time amended in accordance with the rules;

          "AUDITORS" the auditors for the time being of the Company whose shares
     are scheme shares;

          "CONTROL" has the same meaning as in Section 840 of the ICTA;

          "DATE OF GRANT" the date on which an Option is granted under Rule 3;

          "ELIGIBLE EMPLOYEE" any person holding Employment who is not precluded
     from participating in the Scheme by paragraph 8 of Schedule 9 of the ICTA;

          "EMPLOYMENT" employment as an employee or director of the Company or
     any Affiliate who is resident in the United Kingdom and who is required to
     devote substantially the whole of his working time to the performance of
     his duties;

          "GRANT PERIOD" the period of 42 days commencing on the day after any
     of the following:

             (a) the date on which the Company releases its interim results or
        its final results for any financial period; or

             (b) the date on which listing particulars or a document containing
        equivalent information relating to Shares is issued; or

             (c) the date on which Approval is given;

     provided that no Option may be granted until Approval has been obtained.

          "GROUP" the Company and its Subsidiaries which are under the Control
     of the Company;

          "ICTA" Income and Corporation Taxes Act 1988;

          "ISSUE OR REORGANISATION" any variation in the capital of the Company
     (or any other company whose shares are scheme shares following an exchange
     of options pursuant to Rule 13) arising from or in connection with a
     capitalisation issue, an offer to the holders of Shares by way of rights, a
     subdivision, consolidation, reduction or other variation of share capital;

          "MARKET VALUE" means an amount equal to the market value of a Share
     determined in accordance with Part VIII of the Taxation of Chargeable Gains
     Act 1992 agreed in advance for the purposes of the Scheme with the Shares
     Valuation Division of the Inland Revenue;

                                       B-1
<PAGE>   30

          "OPTION" means a right to acquire Shares under the UK Approved Part;

          "OTHER EXECUTIVE OPTION SCHEME" any Other Option Scheme the grant of
     any option under which is in practice substantially limited to persons of
     executive status;

          "OTHER OPTION SCHEME" any employee share option scheme adopted by the
     Company in the United Kingdom, other than the Plan, providing for the issue
     of Shares;

          "PARTICIPATING COMPANY" any company within the Group to which the Plan
     Administrator from time to time extends the Scheme;

          "REMUNERATION" at any particular time, an Eligible Employee's relevant
     emoluments for the current or preceding year of assessment (whichever of
     those years gives the greater amount) or, if there were no relevant
     emoluments for the preceding year of assessment, his relevant emoluments
     for the period of twelve months beginning with the first day during the
     current year of assessment in respect of which there are relevant
     emoluments and "relevant emoluments" has the meaning ascribed to it in
     paragraph 28(4) of Schedule 9 of the ICTA;

          "SHARE" a share of common stock of the Company or, if Rule 13 has been
     applied, the company whose shares are scheme shares which satisfies the
     conditions of paragraphs 10 to 14 of Schedule 9 of the ICTA;

          "SUBSIDIARY" a company which is a subsidiary of the Company within the
     meaning of Section 736 of the Companies Act 1985;

     (2) Other words or expressions, so far as not inconsistent with the
context, shall have the same meanings as in Schedule 9 of the ICTA or the rules
of the Plan.

     (3) Words importing the singular shall include the plural and vice versa
and words importing the masculine shall include the feminine.

     (4) Any reference, express or implied, to an enactment includes references
to:

          (a) that enactment as amended, extended or applied by or under any
     other enactment; and

          (b) any enactment which that enactment re-enacts (with or without
     modification).

     "UK APPROVED PART" the UK Approved Section of the Plan, in its present
     form, as from time to time amended in accordance with the rules.

2. ELIGIBILITY

     No person is entitled as of right to participate in the UK Approved Part.
The Plan Administrator may decide from time to time which Eligible Employee or
Eligible Employees may participate and the extent of the participation.

3. GRANT OF OPTIONS

     (1) The Plan Administrator may adopt any procedure for granting Options.
Options may be granted by the Plan Administrator. The form for the time being of
any Option certificate or other document shall be determined by the Plan
Administrator subject to the approval of the Inland Revenue.

     (2) Options shall be granted by deed. A single deed of grant may be
executed in favour of any number of persons.

     (3) The Date of Grant of an Option shall be the day on which the deed
granting the Option is executed, or such later date as may be approved in the
deed.

     (4) A participant who is granted an Option by deed may, with the consent of
the Plan Administrator, renounce the Option, in whole or in part, within 30 days
of the Date of Grant and, to the extent renounced, shall be treated as if it had
never been granted.

                                       B-2
<PAGE>   31

     (5) If Shares are listed or dealt in on the Unlisted Securities Market of
the London Stock Exchange the Date of Grant must be chosen so that each dealing
day used to determine the Acquisition Price lies within a Grant Period. However,
Options may be granted at any other time when the Plan Administrator considers
that there are exceptional circumstances justifying the grant of Options.

     (6) An Option certificate or deed of grant shall be sent to the Optionee as
soon as practicable after an Option has been granted.

     (7) An Option shall constitute a contract between the Company and the
Optionee incorporating the provisions of the UK Approved Part and the Plan so
far as relevant.

     (8) An Option shall not be granted to an Eligible Employee if he is bound
to retire in accordance with the terms of his contract of employment within two
years of the Date of Grant.

4. PERFORMANCE REQUIREMENTS

     (1) The Plan Administrator may grant an Option to an Eligible Employee
subject to such objective additional terms and conditions as they consider
appropriate.

     (2) The Plan Administrator may subsequently alter or waive any additional
terms and conditions imposed under sub-rule (1) provided that any alteration to
a term or condition relating to performance must be such that the altered term
or condition reflects a fairer measure of the performance required and is no
more difficult to satisfy than the term or condition at the Date of Grant.

     (3) The circumstances in which the Plan Administrator may alter or waive
the additional terms and conditions imposed shall be specified in the letter of
invitation (if the invitation procedure is used) or in the letter enclosing the
option certificate or in the deed of grant.

     (4) The Plan Administrator must act fairly and reasonably in imposing,
altering or waiving any terms and conditions and no material terms and
conditions may be imposed or subsequently altered or waived without the prior
approval of the Board of Inland Revenue.

     (5) Any additional terms and conditions to which an Option is subject under
sub-rule 4(1) shall be deemed to be waived in any of the circumstances specified
in Rules 8(1)(b), other than retirement at or after any age at which he is bound
to retire in accordance with the terms of his contract of employment, 8(1)(c),
13 and 14.

5. PROHIBITION ON ASSIGNMENT

     (1) No Option granted under the Scheme may be transferred, assigned,
charged or otherwise alienated (without prejudice to any right of a person's
legal personal representatives to exercise the Option following death).

     (2) If an Optionee enters into a composition with his creditors in
satisfaction of his debts or a bankruptcy order is made against him his Option
will lapse.

6. LIMIT ON SHARES

     The total number of Shares which may be issued under the Plan, including
the UK Approved Part, shall not exceed the number set forth in the Plan. In the
event of an Issue or Reorganisation this number of Shares may be adjusted in
such manner as the Plan Administrator decides provided that the adjustment will
not have effect unless the Auditors certify in writing that the adjustment is in
their opinion fair and reasonable.

                                       B-3
<PAGE>   32

7. EXERCISE OF OPTIONS

     (1) Save as provided in Rules 8, 9, 10, 13 and 14, an Option shall be
capable of being exercised in full at any time following the earliest of:

          (a) the third anniversary of the Date of Grant;

          (b) the Optionee's death or ceasing to be in Employment by reason of
     retirement at any age at which the Optionee is bound to retire in
     accordance with the terms of his contract of employment, redundancy, injury
     or disability;

          (c) the Optionee ceasing to be in Employment by reason of the
     Participating Company by which he is employed ceasing to be under the
     Control of the Company or by reason of the transfer or sale of the
     undertaking or part of the undertaking in which he is employed to a person
     who is not under the Control of the Company;

          (d) the occurrence of the circumstances permitting the exercise of
     Options specified in Rule 13 or 14.

     (2) If an Option is subject to additional terms and conditions under Rule
4(2) it may only be exercised in accordance with those terms and conditions.

     (3) An Optionee shall not be treated for the purposes of Rule 7, 8 or 9 as
ceasing to be in Employment until such time as he is no longer a director or
employee of any company within the Group and a female Optionee who ceases
Employment by reason of pregnancy or confinement and who is entitled to exercise
and subsequently exercises her statutory right (or any corresponding contractual
right) to return to work before exercising an Option shall be treated for those
purposes as not ceasing to be in Employment.

     (4) An Option may not be exercised by an Optionee at any time when he is
ineligible to participate in the UK Approved Part by virtue of paragraph 8 of
Schedule 9 of the ICTA.

8. LAPSE OF OPTION

     (1) Unless provided otherwise elsewhere in the Rules, an Option shall lapse
to the extent that it has not been exercised (whether or not it became
exercisable) by the earliest of:

          (a) the tenth anniversary of the Date of Grant;

          (b) the expiry of 90 days from the date on which the Optionee ceases
     to be in Employment by reason of retirement at any age at which the
     Optionee is bound to retire in accordance with the terms of his contract of
     employment, redundancy, injury or disability, or the date on which the
     Optionee ceases to be in Employment by reason of the Participating Company
     by which he is employed ceasing to be under the Control of the Company or
     the transfer or sale of the undertaking or part of the undertaking in which
     he is employed to a person who is not under the Control of the Company;

          (c) the expiry of the period referred to in Rule 13;

          (d) the expiry of the period referred to in Rule 14;

          (e) the date on which:

             (i) the Optionee gives or is given notice to leave Employment if he
        subsequently ceases to be in Employment (and for the avoidance of doubt
        any purported exercise of the Option during the period of notice shall
        be of no effect); or

             (ii) the Optionee ceases to be in Employment without any notice
        having been given in any circumstances other than death and those
        referred to in sub-paragraphs (b) and (c) of this paragraph unless
        (being female) she is entitled to exercise and subsequently does
        exercise the statutory right (or any corresponding contractual right) to
        resume Employment after an absence due to pregnancy or confinement.
                                       B-4
<PAGE>   33

     (2) If an Optionee dies at any time when his Option is outstanding whether
or not it is then capable of being exercised, the Option shall be and remain
capable of exercise until the expiry of 90 days from the date of his death but
shall lapse earlier in the circumstances specified in Rule 13 or Rule 14.

     (3) An Option shall not lapse by virtue of this Rule if the occasion for
lapse falls in a period when the Option is capable of being exercised under Rule
13 but the Option shall lapse on the expiry of that period or, if earlier, one
year after the date of the Optionee's death.

9. CESSATION OF EMPLOYMENT -- SPECIAL CIRCUMSTANCES

     (1) If an Optionee ceases to be in Employment, whether or not within the
period specified in sub-rule 7(1)(a), in circumstances in which his Option is
not exercisable under Rule 7 or would lapse immediately under Rule 8 the Plan
Administrator, acting fairly and reasonably, may in its discretion permit his
Option to be exercisable in whole or in part during such period (but not later
than one year after his death) and on such other terms as they may decide.

     (2) If an Option would lapse at the end of any period specified in Rule 8
following the cessation of the Optionee's Employment the Plan Administrator may
defer the lapse of his Option until the end of such longer period as it may
determine, acting fairly and reasonably, but not later than one year after his
death and not exceeding a period which expires three years and six months after
the Date of Grant or, if longer, three years and six months after the last
occasion on which the Optionee exercised an option in circumstances qualifying
for relief from income tax under Section 185 of the ICTA.

     (3) If an Optionee ceases to be in Employment but continues to provide
services to the Group on a part-time basis as an employee or a director or on a
self-employed basis the Plan Administrator may determine acting fairly and
reasonably that his Option shall neither become exercisable nor lapse by virtue
of such cessation and that Rules 8 to 10 shall apply when he subsequently ceases
to provide services to the Group, or in such other circumstances as the Plan
Administrator may determine, acting fairly and reasonably, with such
modifications as are necessary.

10. MANNER OF EXERCISE AND ISSUE OR TRANSFER OF SHARES

     (1) An Option may be exercised by the Optionee giving notice of exercise in
a form approved by the Plan Administrator accompanied by the relevant option
certificate or deed of grant and payment of the total Acquisition Price of the
Shares in respect of which the Option is exercised.

     (2) The Company shall allot or procure the transfer of the Shares in
respect of which the Option has been exercised within 30 days of the date of
exercise.

     (3) Shares issued under the UK Approved Part will rank pari passu in all
respects with issued Shares of the same class. However, they will not be
entitled to any rights attaching to Shares by reference to a record date prior
to the date of exercise of the Option.

     (4) An Option may be exercised in whole or in part and, in the event of an
Option being exercised in part the Plan Administrator may call in or cancel any
outstanding option certificate or deed of grant and furnish the Optionee with
details of the date on which the Option was last exercised and the number of
Shares outstanding under the Option. The Directors may determine, acting fairly
and reasonably, that the Option may only be exercised in respect of a reasonable
minimum number of Shares and/or in respect of a multiple of any round number of
Shares, or in respect of the balance of Shares outstanding in the Option.

     (5) The allotment or transfer of Shares under the Plan is subject to
obtaining any approval or consent required under any applicable regulations or
enactment.

                                       B-5
<PAGE>   34

11. ISSUE OR REORGANISATION

     (1) In the event of any Issue or Reorganisation:

          (a) the number of Shares comprised in an Option; and/or

          (b) the Acquisition Price under an Option

may be adjusted in such manner as the Plan Administrator decides subject to the
prior approval of the Inland Revenue and the written concurrence of the Auditors
that in their opinion the adjustment is fair and reasonable.

     (2) Following an adjustment under paragraph (1) above, Shares must continue
to comply with paragraphs 10 to 14 of Schedule 9 of the ICTA.

     (3) If an Option relates to unissued Shares an adjustment under paragraph
(1) above may reduce or further reduce the Acquisition Price below the nominal
value of a Share if:

          (a) a part of the reserves of the Company equal to the difference
     between the adjusted Acquisition Price and the nominal value of the Shares
     concerned ("Relevant Amount") may be capitalised if the Option is exercised
     so as to pay up the Relevant Amount; and

          (b) the Company has sufficient reserves available.

     (4) The Plan Administrator may notify Optionees of any adjustments made
under this Rule 11 and may call in, cancel, endorse, issue or reissue any option
certificate or deed of grant following an adjustment.

12. TAKEOVER AND RECONSTRUCTION

     (1) If:

          (a) a general offer is made to acquire the whole of the issued
     ordinary share capital of the Company (or such part thereof as is not at
     the time owned by the offeror or any company controlled by the offeror
     and/or persons acting in concert with the offeror) and after the
     announcement of the general offer the offeror (and any such companies
     and/or persons) acquires Control of the Company, or

          (b) a general offer is made to acquire the whole of the issued
     ordinary share capital of the Company (or such part thereof as aforesaid)
     by any person who (together with any company controlled by such person
     and/or persons acting in concert with him) has Control of the Company,

a participant may, subject to the provisions of Rule 7, be entitled to exercise
his Option at any time during the period of six months following, in the case of
an offer within paragraph (a) above, the date of the acquisition of Control and,
in the case of an offer within paragraph (b) above, the date on which the offer
is made or, if the offer was conditional, the later date on which the offer
becomes unconditional.

     (2) The Company shall use its best endeavours to procure that if a
participant is allotted Shares pursuant to the exercise of Options in accordance
with Rule 10(1) then if such Shares were not the subject of the said general
offer the offeror shall make an offer to acquire from the participant his Shares
upon the same terms as Shares of the same class were acquired under the general
offer.

13. EXCHANGE OF OPTIONS

     If any company (the "acquiring company") obtains Control of the Company as
a result of making:

          (i) a general offer to acquire the whole of the issued share capital
     of the Company which is made on a condition such that if it is satisfied
     the person making the offer will have Control of the Company, or

                                       B-6
<PAGE>   35

          (ii) a general offer to acquire all the shares in the Company which
     are of the same class as the scheme shares,

any participant may at any time within the appropriate period, by agreement with
the acquiring company, release his Option ("old rights") in consideration of the
grant to him of rights ("new rights") which are equivalent to his Option but
relate to shares in a different company (whether the acquiring company itself or
some other company falling within paragraph 10(b) or (c) of Schedule 9 of the
ICTA). "The appropriate period" and "equivalent" have the same meaning as in
paragraph 15 of Schedule 9 of the ICTA and accordingly the new rights shall not
be regarded for the purpose of the Scheme as equivalent to the old rights
unless:

          (a) the shares to which they relate satisfy the conditions specified,
     in relation to scheme shares, in paragraphs 10 to 14 of Schedule 9 of the
     ICTA; and

          (b) the new rights will be exercisable in the same manner as the old
     rights and subject to the provisions of the Scheme as it had effect
     immediately before the release of the old rights; and

          (c) the total Market Value, immediately before the release, of the
     shares which were subject to the participant's old rights is equal to the
     total market value, immediately after the grant of the shares in respect of
     which the new rights are granted to the participant; and

          (d) the total amount payable by the participant for the acquisition of
     shares in pursuance of the new rights is equal to the total amount that
     would have been payable for the acquisition of shares in pursuance of the
     old rights.

The new rights shall for the purposes of the UK Approved Part be treated as
having been granted at the time when the old rights were granted and references
to Shares shall, in relation to the new rights, be taken as references to the
shares of the company whose shares are scheme shares. References to the Company
shall be taken to be references to the company whose shares are scheme shares in
Rules 6, 7, 8, 9, 10, 11, 12(3), and 12(4).

14. VOLUNTARY WINDING UP

     If a resolution for a shareholder's voluntary winding up of the Company is
passed, an Optionee may exercise his Option, subject to Rule 8, within three
months of the date of the resolution.

15. AMENDMENT

     (1) Subject to paragraph (2) below the Plan Administrator may by resolution
at any time amend the rules of the UK Approved Part in any respect except that
any amendment made when the UK Approved Part is approved under Schedule 9 of the
ICTA shall not have effect without the prior approval of the Inland Revenue.

     (2) Subject to paragraph (4) below, no amendment to the UK Approved Part to
the advantage of Optionees or Eligible Employees may be made:

          (a) to the number of Shares specified in Rule 6 and the provisions for
     adjustment of that number (except as provided in Rule 6);

          (b) to the definitions of "Acquisition Price", "Eligible Employee",
     "Employment", "Grant Period", "Group Remuneration" and "Issue or
     Reorganisation";

          (c) which would alter to the advantage of Eligible Employees or
     Optionees, any of the provisions of Rules 4, 5, 6, 7, 8, 9, 11(4), 11(6),
     12, 13, paragraph (2) of this Rule or to the Schedules

without the prior approval of a majority of the stockholders of the Company
present at a meeting of stockholders.

     (3) No amendment shall be made under paragraph (1) which would abrogate or
materially affect adversely the subsisting rights of an Optionee unless it is
made with his written consent or by a resolution
                                       B-7
<PAGE>   36

passed as if the Options constituted a separate class of share capital and the
provisions of the Articles of Organisation of the Company relating to class
meetings applied to that class mutatis mutandis.

     (4) Paragraph (2) shall not apply to any amendment which:

          (a) is confined to Options which do not involve the issue of new
     Shares (including the eligibility requirements and the terms of such
     Options insofar as they do not involve the issue of new Shares); or

          (b) is not so confined and affects the limit in Rule 7(3) provided
     that the Plan Administrator is reasonably satisfied that the purpose or
     effect of the amendment is substantially to comply with any current
     published guidelines issued by institutional investors; or

          (c) is not so confined and:

             (i) is necessary or desirable in order to obtain or maintain Inland
        Revenue approval of the Approved Part under Schedule 9 of the ICTA or
        any other enactment, or to comply with or take account of the provisions
        of any proposed or existing legislation or of any Inland Revenue
        practice or concession, or to obtain or maintain favourable taxation
        treatment of the Company, any Subsidiary or any Optionee; and

             (ii) does not affect the basic principles of the Approved Part.

16. DURATION AND TERMINATION

     No Options may be granted under the Approved Part more than ten years after
the date of adoption of the Approved Part by the Company. The Plan Administrator
may at any time terminate the Approved Part and no further Options will be
granted after that date, but Options granted before that date will continue to
be valid and exercisable in accordance with these Rules.

                                       B-8
<PAGE>   37

                                                                     1753-SPS-00
<PAGE>   38
         THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF
         CHARLES RIVER ASSOCIATES INCORPORATED. THE BOARD OF DIRECTORS
                  RECOMMENDS A VOTE IN FAVOR OF EACH PROPOSAL.

[LOGO]               CHARLES RIVER ASSOCIATES INCORPORATED


                   PROXY FOR SPECIAL MEETING OF STOCKHOLDERS
                     TO BE HELD ON _________________, 2000


     The undersigned stockholder of Charles River Associates Incorporated
("CRA"), revoking all prior proxies, hereby appoints James C. Burrows and Laurel
E. Morrison, and each of them acting singly, proxies, with full power of
substitution, to vote all shares of capital stock of CRA which the undersigned
is entitled to vote at the Special Meeting of Stockholders of CRA, to be held at
the offices of Foley, Hoag & Elliot LLP, One Post Office Square, 16th Floor,
Boston, Massachusetts, on ___________, ___________, _____, beginning at 10:00
A.M., local time, and at any adjournments or postponements thereof, upon the
matters set forth in the Notice of Special Meeting dated _________, _____ and
the related Proxy Statement, copies of which have been received by the
undersigned, and in their discretion upon any business that may properly come
before the meeting or any adjournment or postponement thereof. Attendance of the
undersigned at the Special Meeting or any adjournment or postponement thereof
will not be deemed to revoke this proxy unless the undersigned shall
affirmatively indicate the intention of the undersigned to vote the shares
represented hereby in person prior to the exercise of this proxy.



<PAGE>   39
[box]  Please mark
       votes as in
       this example.


THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AS DIRECTED. IF NO DIRECTION
IS GIVEN WITH RESPECT TO ANY OF THE PROPOSALS, THE SHARES REPRESENTED BY THIS
PROXY WILL BE VOTED FOR EACH PROPOSAL OR OTHERWISE IN ACCORDANCE WITH THE
RECOMMENDATION OF THE BOARD OF DIRECTORS.


1.   To amend CRA's 1998 Incentive and Nonqualified Stock Option Plan to
     increase the number of shares of common stock that CRA may issue under the
     plan from 970,000 to 1,870,000.

     [ ]  FOR                    [ ]  AGAINST               [ ] ABSTAIN

2.   To amend CRA's 1998 Incentive and Nonqualified Stock Option Plan to
     facilitate the granting of options to CRA's employees in the United
     Kingdom.

     [ ]  FOR                    [ ]  AGAINST               [ ] ABSTAIN


     MARK HERE IF YOU PLAN TO ATTEND THE MEETING            [ ]

     MARK HERE FOR ADDRESS CHANGE AND NOTE AT LEFT          [ ]

     PLEASE PROMPTLY DATE AND SIGN THIS PROXY AND MAIL IT IN THE ENCLOSED
     ENVELOPE TO ENSURE REPRESENTATION OF YOUR SHARES. NO POSTAGE NEED BE
     AFFIXED IF MAILED IN THE UNITED STATES.

     Please sign exactly as name(s) appears on stock certificate. If shares are
     held as joint tenants, both should sign. If stockholder is a corporation,
     please sign full corporate name by president or other authorized officer
     and, if a partnership, please sign full partnership name by an authorized
     partner or other person. If signing as attorney, executor, administrator,
     trustee or guardian, please give full title as such.


Signature:                                                 Date:
          ------------------------------------------------        ------------


Signature:                                                 Date:
          ------------------------------------------------        ------------



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