The ethics panel that decides which firms Norway's $800-billion wealth fund should avoid should lose its independence and become part of the central bank, a report said, a shift critics said would undermine the fund's ethical strategy. The report by a government-appointed commission also called for more research on the performance of ethical investments, saying a lack of such studies made it difficult to assess how the fund's stance compared with other strategies. [refers to firms that have been excluded by the Fund - Lockheed Martin , Boeing, Philip Morris, Walmart]