February 5, 2001 Credit Suisse Asset Management Securities, Inc. 466 Lexington Avenue New York, New York 10017-3147 Dear Sirs: In accordance with Section 7 of the Co-Administration Agreement, dated November 1, 1999 (the "Agreement"), between Warburg...

                                                                    EXHIBIT h(7)

                           CO-ADMINISTRATION AGREEMENT

                                February 5, 2001

Credit Suisse Asset Management
  Securities, Inc.
000 Xxxxxxxxx Xxxxxx
Xxx Xxxx, Xxx Xxxx  00000-0000

Dear Sirs:

         In accordance with Section 7 of the Co-Administration Agreement, dated
November 1, 1999 (the "Agreement"), between Warburg Pincus Trust (the "Trust"),
and Credit Suisse Asset Management Securities, Inc. ("CSAMSI"), the Trust hereby
notifies CSAMSI of the Trust's desire to amend Exhibit A of the Agreement to
include the Global Telecommunications Portfolio (the "Portfolio"), and to have
CSAMSI render services as Co-Administrator under the terms of the Agreement with
respect to the Portfolio.

          Please confirm that the foregoing is in accordance with your
understanding by indicating your acceptance hereof at the place below indicated,
whereupon it shall become a binding agreement between us.

                                       Very truly yours,

                                       WARBURG PINCUS TRUST

                                       By: /s/Xxx Xxxxxx
                                           -------------
                                           Name: Xxx Xxxxxx
                                           Title:Secretary

Acceptance:

CREDIT SUISSE ASSET MANAGEMENT
SECURITIES, INC.

                                       By: /s/Xxx Xxxxxx
                                           -------------
                                           Name: Xxx Xxxxxx
                                           Title:Secretary