This is the second part of a 4 episode mini-series. Dan Ariely is a professor of psychology and behavioral economics at Duke University and a founding member of the Center for Advanced Hindsight. He is the author of the bestsellers Predictably Irrational, The Upside of Irrationality, The Honest Truth About Dishonesty, Dollars and Sense and Amazing Decisions -- as well as the TED Book Payoff: The Hidden Logic that Shapes Our Motivations. He is also co-creator of the film documentary (Dis)Honesty: The Truth About Lies. Through his research and his (often amusing and unorthodox) experiments, he questions the forces that influence human behavior and the irrational ways in which we often all behave. Feel free to check out our first episode in this mini-series. Please enjoy!