Daniel Kahneman is Eugene Higgins Professor of Psychology Emeritus at Princeton University and Professor of Psychology and Public Affairs Emeritus at Princeton's Woodrow Wilson School of Public and International Affairs. He received the 2002 Nobel Prize in Economic Sciences for his pioneering work with Amos Tversky on decision-making. He is also a 2013 Recipient of the Presidential Medal of Freedom. Prof. Kahneman is not employed by or affiliated with Wealthfront and has given us his permission to run this excerpt.