STEVEN D. LEVITT is a professor of economics at the University of Chicago and the recipient of the John Bates Clark medal, awarded to the most influential economist under the age of forty.
Stephen J. Dubner is the author of Confessions of a Hero Worshiper and Turbulent Souls and is a former writer and editor at the New York Times Magazine, where in 2003 he wrote the cover story about Steven Levitt that launched FREAKONOMICS. He lives in New York City with his family.