BOB LITTERMAN is Managing Director and Head of Goldman Sachs Asset Management s Quantitative Resources Group. Bob is the codeveloper, along with the late Fischer Black, of the Black-Litterman Global Asset Allocation Model. As the head of the Quantitative Resources Group, Bob oversees two portfolio management teams, Quantitative Equities and Quantitative Strategies, a research and strategy team, Global Investment Strategies, and a risk modeling group called PACE (Portfolio Analysis and Construction Environment). Together, these groups include over ninety professionals and manage over $45 billion in assets as of December 31, 2002.