UBS Warburg's longtime fixed-income senior economist Jeff Palma has given up yield curve watching and data forecasting to join his firm's nascent global asset-allocation group. Palma, who is part of a two-person group currently headed by Larry Hathaway, will be responsible for making asset-allocation calls on global bonds and equities. He says that he has been concentrating on analyzing relative value fixed-income ideas, given his bond background. Jim O'Sullivan, who recently joined the U.S. economics group fromJ.P. Morgan, will assume his senior U.S. economist duties. O'Sullivan reports to Maury Harris, chief U.S. economist.