Predictably Irrational, Revised and Expanded Edition: The Hidden Forces That Shape Our DecisionsA marvelous book thought provoking and highly entertaining. Jerome Groopman, New York Times bestselling author of How Doctors Think "An important book. Full of valuable and entertaining insights that will make an impact on your business, professional, and personal life." Jack M Greenberg, Chairman, Western Union Company, Retired Chairman and CEO, McDonald's Corporation Why do our headaches persist after we take a one cent aspirin but disappear when we