STEVEN D. LEVITT is a professor of economics at the University of Chicago and a recipient of the John Bates Clark Medal, awarded to the most influential economist under the age of forty.
STEPHEN J. DUBNER, a former writer and editor at The New York Times Magazine, is the author of Turbulent Souls (Choosing My Religion), Confessions of a Hero-Worshiper, and the children's book The Boy with Two Belly Buttons.
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