Predictably Irrational and The Upside of Irrationality are two New York Times bestsellers by Dan Ariely. He is James B. James B. James B. James B. James B. James B He is the creator of the Center for Enhanced Hindsight and a Duke University professor of psychology and behavioral economics. His work has appeared in publications such as the New York Times, Wall Street Journal, Washington Post, Boston Globe, and others.