EXHIBIT 4

                             JOINT FILING AGREEMENT


                  Each of the undersigned acknowledges and agrees that the
foregoing statement on Schedule 13D is filed on behalf of the undersigned and
that all subsequent amendments to this statement on Schedule 13D shall be filed
on behalf of the undersigned without the necessity of filing additional joint
acquisition statements. Each of the undersigned acknowledges that it shall be
responsible for the timely filing of such amendments, and for the completeness
and accuracy of the information concerning it contained therein, but shall not
be responsible for the completeness and accuracy of the information concerning
the other, except to the extent that he or it knows or has reason to believe
that such information is inaccurate.

Dated as of January 18, 2001.

OAKTREE CAPITAL MANAGEMENT, LLC


By: /s/ KENNETH LIANG
    -------------------------------------------------------------
   Kenneth Liang
   Managing Director and General Counsel


OCM PRINCIPAL OPPORTUNITIES FUND, L.P.
By: Oaktree Capital Management, LLC,
its general partner

By: /s/ KENNETH LIANG
    -------------------------------------------------------------
    Kenneth Liang
    Managing Director and General Counsel