STANFORD, Calif. --Stanford University has retained a British investment firm to manage its international investments, the latest in a series of innovative investment policies.

The Stanford Board of Trustees a few weeks ago agreed to appoint G.T. Management Ltd. as its international investment manager, and allotted $50 million to them to invest, the Stanford Daily reported.

The Board also decided to change the allocation of its endowment among various types of investments--shifting $60 million from fixed-income investments to equity investments, doubling its international investments, and beginning to invest in smaller, less prominent companies.

These changes "move the Stanford endowment to a very innovative limit," Rodney Adams, director of investment, said, adding that Stanford expects to increase the real return of its endowment by 1 per-cent.

Adams added that he expects to see investments in Japan, Australia, West Germany and Britain.