EXHIBIT 16(a)

                                POWER OF ATTORNEY

     The undersigned hereby constitutes Kenneth Reid his true and lawful
attorney, with full power to sign for him, in his name and in the capacity
indicated below, any and all registration statements of Barr Rosenberg Series
Trust and Barr Rosenberg Variable Insurance Trust, each a Massachusetts business
trust, under the Securities Act of 1933 or the Investment Company Act of 1940,
and generally to do all things in his name and on his behalf to enable Barr
Rosenberg Series Trust and Barr Rosenberg Variable Insurance Trust to comply
with the provisions of the Securities Act of 1933, the Investment Company Act of
1940, and all requirements and regulations of the Securities and Exchange
Commission, hereby ratifying and confirming his signature as it may be signed by
his said attorney to any and all registration statements and amendments thereto.

     Witness my hand this 1st day of February, 2001.



                                WILLIAM F. SHARPE
                                --------------------------
                                William F. Sharpe
                                Trustee