Dan Ariely, the James B. Duke Professor of Psychology & Behavioral Economics at Duke University, studies questions about human behavior in order to help people live more sensible — if not rational — lives. His sometimes unusual experiments are consistently interesting, amusing and informative, demonstrating profound ideas that fly in the face of common wisdom. He is a founding member of the Center for Advanced Hindsight, co-creator of the film documentary (Dis)Honesty: The Truth About Lies, and a three-time New York Times bestselling author.