#16 in Economics
Description: Steven D. Levitt is the Alvin H. Baum Professor of Economics at the University of Chicago, where he is also director of The Becker Center on Chicago Price Theory. In 2004, he was awarded the John Bates Clark Medal, which recognizes the most influential economist in America under the age of 40. More recently, he was named one of Time magazine's "100 People Who Shape Our World." Levitt received his B.A. from Harvard University in 1989, his Ph.D. from M.I.T. in 1994, and has taught at Chicago since 1997.