CUSIP No. 751452202                   13-G                   Page 7  of  8 Pages


                            EXHIBIT 1 TO SCHEDULE 13G
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                                FEBRUARY 14, 2001
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               MORGAN  STANLEY DEAN WITTER & CO. and MORGAN  STANLEY DEAN WITTER

               INVESTMENT    MANAGEMENT   INC.   hereby   agree   that,   unless

               differentiated,  this  Schedule 13G is filed on behalf of each of

               the parties.


            MORGAN STANLEY DEAN WITTER & CO.

            BY: /s/ Dennine Bullard
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            Dennine Bullard / Morgan Stanley & Co. Incorporated

            MORGAN STANLEY DEAN WITTER INVESTMENT MANAGEMENT INC.

            BY: /s/ Donald P. Ryan
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            Donald P. Ryan / Principal Morgan Stanley Dean Witter Investment
                             Management Inc.

* Attention. Intentional misstatements or omissions of fact constitute federal
  criminal violations (see 18 U.S.C. 1001).