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                                                   Registration No. 333-


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM S-8

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                      Charles River Associates Incorporated
             -----------------------------------------------------
             (Exact name of registrant as specified in its charter)

         Massachusetts                                        04-2372210
- ----------------------------- --                         ------------------
(State or other jurisdiction of                           (I.R.S. Employer
 incorporation or organization)                          Identification No.)
 
200 Clarendon Street, Boston, Massachusetts                     02116
- -------------------------------------------                   ----------
 (Address of principal executive offices)                     (Zip Code)



                      CHARLES RIVER ASSOCIATES INCORPORATED
                        1998 EMPLOYEE STOCK PURCHASE PLAN
                            (Full title of the plan)

                                James C. Burrows
                      Charles River Associates Incorporated
                              200 Clarendon Street
                           Boston, Massachusetts 02116
                                 (617) 425-3000
              -----------------------------------------------------
                          (Name and address, including
              telephone number and area code, of agent for service)

                                 WITH A COPY TO:
                           Peter M. Rosenblum, Esquire
                             Foley, Hoag & Eliot LLP
                             One Post Office Square
                           Boston, Massachusetts 02109
                                 (617) 832-1000


- --------------------------------------------------------------------------------
                         CALCULATION OF REGISTRATION FEE
================================================================================
                                                       Proposed
 Title of                             Proposed          Maximum
Securities             Amount          Maximum         Aggregate      Amount of
  to be                 to be       Offering Price      Offering     Registation
Registered            Registered      Per Share          Price           Fee
- --------------------------------------------------------------------------------

Common Stock           243,000        $20.25 (1)     $4,920,750 (1)   $1,452 (1)
(without par value)

================================================================================

         (1) Estimated pursuant to Rule 457(c) and (h) based on 85% of the
average of the high and low prices of the Common Stock as reported on the
National Association of Securities Dealers Automated Quotation National Market
System on September 9, 1998.

                   -------------------------------------------


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                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

         The following documents filed with the Securities and Exchange
Commission (the "Commission") are incorporated in this Registration Statement by
reference:

         (a) the Prospectus dated April 23, 1998 of Charles River Associates
Incorporated (the "Company" or the "Registrant") included in the Company's
Registration Statement on Form S-1, File No. 333-46941, as declared effective by
the Commission on April 23, 1998;

         (b) the description of the Company's Common Stock contained in the
Registration Statement on Form 8-A filed with the Commission on April 23, 1998
under Section 12 of the Securities Exchange Act of 1934, including any amendment
or report filed for the purpose of updating such description;

         (c) the Company's quarterly report on Form 10-Q filed with the
Commission on June 26, 1998 under Section 13 of the Securities Exchange Act of
1934, as amended.

         All documents subsequently filed by the Company pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended,
prior to the filing of a post-effective amendment which indicates that all
securities offered have been sold or which deregisters all securities then
remaining unsold, shall be deemed to be incorporated by reference in this
Registration Statement and to be part hereof from the date of filing of such
documents.

ITEM 4.  DESCRIPTION OF SECURITIES.

         Not applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

         The validity of the securities registered hereby is being passed upon
for the Company by Foley, Hoag & Eliot LLP, Boston, Massachusetts.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         Article 6 of the Company's Amended and Restated Articles of
Organization provides that no director shall be personally liable to the Company
or its stockholders for monetary damages for breach of fiduciary duty as a
director of the Company to the maximum extent permitted by Massachusetts law.
Section 13(b)(1 1/2) of Chapter 156B of the Massachusetts General Laws (the
"Massachusetts Business Corporation Law") provides that the articles of
organization of a corporation may state a provision eliminating or limiting the
personal liability of a director to a corporation or its stockholders for
monetary damages for breach of fiduciary duty as a director,


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provided, however, that such provision shall not eliminate or limit the
liability of a director (i) for any breach of the director's duty of loyalty to
the corporation or its stockholders, (ii) for acts of omissions not in good
faith or which involve intentional misconduct or knowing violation of law,
(iii) under section 61 or 62 of the Massachusetts Business Corporation Law
dealing with liability for unauthorized distributions and loans to insiders,
respectively, or (iv) for any transaction from which the director derived an
improper personal benefit.

         Article 6 of the Company's Amended and Restated Articles of
Organization further provides that the Company shall, to the fullest extent
authorized by the Massachusetts Business Corporation Law, indemnify each person
who is, or shall have been, a director or officer of the Company or who is or
was a director or employee of the Company and is serving, or shall have served,
at the request of the Company, as director or officer of another organization or
in any capacity with respect to any employee benefit plan of the Company,
against all expense, liability and loss (including, but not limited to,
attorneys' fees, judgments, fines, ERISA excise taxes or penalties and amounts
paid in settlement) reasonably incurred or suffered by any such person in
connection with, or arising out of, any action, suit or proceeding, whether
civil, criminal, administrative, investigative or otherwise in which they may be
involved by reason of being or having been such a director or officer or as a
result of service with respect to any such employee benefit plan. Section 67 of
the Massachusetts Business Corporation Law authorizes a corporation to indemnify
its directors, officers, employees and other agents unless such person shall
have been adjudicated in any proceeding not to have acted in good faith in the
reasonable belief that such action was in the best interest of the corporation
or, to the extent such matter related to service with respect to an employee
benefit plan, in the best interests of the participants or beneficiaries of such
employee benefit plan.

         The effect of these provisions would be to permit indemnification by
the Company for, among other liabilities, liabilities arising out of the
Securities Act of 1933, as amended.

         Section 67 of the Massachusetts Business Corporation Law also affords a
Massachusetts corporation the power to obtain insurance on behalf of its
directors and officers against liabilities incurred by them in those capacities.
The Company has procured a directors' and officers' liability and company
reimbursement liability insurance policy that (i) insures directors and officers
of the Company against losses (above a deductible amount) arising from certain
claims made against them by reason of certain acts done or attempted by such
directors or officers and (ii) insures the Company against losses (above a
deductible amount) arising from any such claims, but only if the Company is
required or permitted to indemnify such directors or officers for such losses
under statutory or common law or under provisions of the Company's Amended and
Restated Articles of Organization or Restated By-Laws.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

         Not applicable.

ITEM 8.  EXHIBITS.

4.1      Amended and Restated Articles of Organization of the Company (filed
         as Exhibit 3.2 to the Company's registration statement on Form S-1,
         File No. 333-46941, and incorporated herein by reference).

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4.2      Amended and Restated By-Laws of the Company (filed as Exhibit 3.4 to
         the Company's registration statement on Form S-1, File No. 333-46941,
         and incorporated herein by reference)

4.3      Charles River Associates Incorporated 1998 Employee Stock Purchase
         Plan (filed as Exhibit 10.2 to the Company's registration statement on
         Form S-1, File No. 333-46941, and incorporated herein by reference).

5.1      Opinion of Foley, Hoag & Eliot LLP.

23.1     Consent of Ernst & Young LLP, Independent Auditors.

23.2     Consent of Foley, Hoag & Eliot LLP (included in Exhibit 5.1).

24.1     Power of Attorney (contained on the signature page).

ITEM 9.  UNDERTAKINGS.

         1. The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

         2. The undersigned registrant hereby undertakes:

                  (a) To file, during any period in which offers or sales are
being made, a post-effective amendment to this registration statement:

                         (i) To include any prospectus required by Section
                  10(a)(3) of the Securities Act of 1933;

                         (ii) To reflect in the prospectus any facts or events
                  arising after the effective date of the registration statement
                  (or the most recent post-effective amendment thereof) which,
                  individually or in the aggregate, represent a fundamental
                  change in the information set forth in the registration
                  statement. Notwithstanding the foregoing, any increase or
                  decrease in volume of securities offered (if the total dollar
                  value of securities offered would not exceed that which was
                  registered) and any deviation from the low or high end of the
                  estimated maximum offering range may be reflected in the form
                  of prospectus filed with the Commission pursuant to Rule
                  424(b) if, in the aggregate, the changes in volume and price
                  represent no more than 20 percent change


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                  in the maximum aggregate offering price set forth in the
                  "Calculation of Registration Fee" table in the effective
                  registration statement.

                         (iii) To include any material information with
                  respect to the plan of distribution not previously disclosed
                  in the Registration Statement or any material change to such
                  information in the Registration Statement;

provided, however, that paragraphs 2 (a)(1)(i) and 2 (a)(1)(ii) do not apply if
the information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed with or furnished to the
Commission by the registrant pursuant to Section 13 or 15(d) of the Securities
Exchange Act of 1934 that are incorporated by reference herein.

                  (b) That, for the purpose of determining any liability under
the Securities Act of 1933, each such post-effective amendment shall be deemed
to be a new registration statement relating to the securities offered therein,
and the offering of such securities at that time shall be deemed to be the
initial bona fide offering thereof.

                  (c) To remove from registration by means of a post-effective
amendment any of the securities being registered which remain unsold at the
termination of the offering.

         3. Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers and controlling
persons of the registrant pursuant to the foregoing provisions, or otherwise,
the registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.


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                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the city of Boston, Commonwealth of Massachusetts, on this 15th
day of September, 1998.

                                           CHARLES RIVER ASSOCIATES INCORPORATED



                                           By:/s/ JAMES C. BURROWS
                                              ----------------------
                                              James C. Burrows
                                              President


                                POWER OF ATTORNEY

         KNOW ALL MEN BY THESE PRESENTS that each individual whose signature
appears below constitutes and appoints James C. Burrows, Laurel E. Morrison and
Firoze E. Katrak, and each of them, his true and lawful attorneys-in-fact and
agents with full power of substitution, for him and in his name, place and
stead, in any and all capacities, to sign any and all amendments (including
post-effective amendments) to this registration statement, and to file the same,
with all exhibits thereto, and all documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, and each of them, full power and authority to do and perform each and
every act and thing which they, or any of them, may deem necessary or advisable
to be done in connection with this registration statement, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or any
substitute or substitutes for any or all of them, may lawfully do or cause to be
done by virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities and on the dates indicated.



Signature                             Title                         Date
- ---------                             -----                         ----

/s/ FRANKLIN M. FISHER         Chairman of the Board         September 15, 1998
- -----------------------
Franklin M. Fisher


/s/ JAMES C. BURROWS           President, Chief Executive    September 15, 1998
- -----------------------        Officer and Director
James C. Burrows               (principal executive officer)


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Signature                             Title                         Date
- ---------                             -----                         ----


/s/ LAUREL E. MORRISON         Chief Financial Officer,      September 15, 1998
- -----------------------        Vice President, Finance and
Laurel E. Morrison             Administration, and Treasurer
                               (principal financial and
                               accounting officer


/s/ FIROZE E. KATRAK           Vice President and Director   September 15, 1998
- -----------------------
Firoze E. Katrak


/s/ WILLIAM B. BURNETT         Vice President and Director   September 15, 1998
- -----------------------
William B. Burnett


/s/ CARL KAYSEN                Director                      September 15, 1998
- -----------------------
Carl Kaysen


/s/ ROWLAND T. MORIARTY        Director                      September 15, 1998
- -----------------------
Rowland T. Moriarty



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                                  EXHIBIT INDEX

Exhibit
  No.             Description
- -------           -----------
 4.1              Amended and Restated Articles of Organization of the Company
                  (filed as Exhibit 3.2 to the Company's registration statement
                  on Form S-1, File No. 333-46941, and incorporated herein by
                  reference).

 4.2              Amended and Restated By-Laws of the Company (filed as Exhibit
                  3.4 to the Company's registration statement on Form S-1, File
                  No. 333-46941, and incorporated herein by reference).

 4.3              Charles River Associates Incorporated 1998 Employee Stock
                  Purchase Plan (filed as Exhibit 10.2 to the Company's
                  registration statement on Form S-1, File No. 333-46941, and
                  incorporated herein by reference).

 5.1              Opinion of Foley, Hoag & Eliot LLP.

23.1              Consent of Ernst & Young LLP, independent auditors.

23.2              Consent of Foley, Hoag & Eliot LLP (included in Exhibit 5.1).

24.1              Power of Attorney (contained on the signature page).


   1
                                                                     Exhibit 5.1


                            FOLEY, HOAG & ELIOT LLP
                             ONE POST OFFICE SQUARE
                        BOSTON, MASSACHUSETTS 02109-2170

                           TELEPHONE 617-832-1000   1747 PENNSYLVANIA AVE., N.W.
                           FACSIMILE 617-832-7000      WASHINGTON, D.C.  20006
                             http://www.fhe.com           TEL: 202-223-1200
                                                          FAX: 202-785-6687


                               September 15, 1998


Charles River Associates Incorporated
200 Clarendon Street
Boston, Massachusetts 02116

Ladies and Gentlemen:

         We are familiar with the Registration Statement on Form S-8 (the "S-8
Registration Statement") filed today with the Securities and Exchange Commission
by Charles River Associates Incorporated, a Massachusetts corporation (the
"Company"), relating to 243,000 shares of the Company's common stock, without
par value (the "Common Stock"), issuable pursuant to the Company's 1998 Employee
Stock Purchase Plan (the "Plan").

         We are familiar with the Company's Amended and Restated Articles of
Organization, its Amended and Restated By-Laws, the records of all meetings and
consents of its Board of Directors and of its stockholders, and its stock
records. We have examined such other records and documents as we deemed
necessary or appropriate for purposes of rendering this opinion.

         Based upon the foregoing, we are of the opinion that (a) the Company
has corporate power adequate for the issuance in the manner set forth in the S-8
Registration Statement of the 243,000 shares of its Common Stock to be issued
pursuant to the Plan and offered pursuant to the S-8 Registration Statement, (b)
the Company has taken all necessary corporate action required to authorize the
issuance and sale of such 243,000 shares and (c) when certificates for such
shares have been duly executed and countersigned, and delivered against due
receipt of the purchase price for such shares as described in the Plan, such
shares will be validly and legally issued, fully paid and non-assessable.

         We hereby consent to the filing of this opinion as part of the S-8
Registration Statement.

                                                     Very truly yours,

                                                     FOLEY, HOAG & ELIOT LLP


                                                     By:_____________________
                                                           A Partner
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                                                                    Exhibit 23.1




               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statement
(Form S-8) pertaining to the 1998 Employee Stock Purchase Plan of Charles River
Associates Inc. of our report dated February 25, 1998, with respect to the
consolidated financial statements of Charles River Associates Inc. included in
its Registration Statement (Form S-1 No. 333-46941) and the related prospectus,
as declared effective by the Securities and Exchange Commission on April 23,
1998.


                                                            /s/Ernst & Young LLP
                                                            --------------------
                                                            Ernst & Young LLP

Boston, Massachusetts
September 11, 1998