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Dan Ariely (Hebrew: דן אריאלי; born April 29, 1967) is an Israeli-American professor and author. He serves as a James B. Duke Professor of psychology and behavioral economics at Duke University. Ariely is the founder of the research institution The Center for Advanced Hindsight, co-founder of the companies Kayma, BEworks, Timeful, Genie and Shapa., the Chief Behavioral Economist of Qapital and the Chief Behavioral Officer of Lemonade. Ariely’s TED talks have been viewed over 15 million times. Ariely is the author of the three New York Times best sellers Predictably Irrational, The Upside of Irrationality, and The Honest Truth about Dishonesty, as well as the books Dollars and Sense, Irrationally Yours – a collection of his popular The Wall Street Journal advice column “Ask Ariely”; and Payoff, a short TED book. Ariely appeared in several documentary films, including The Inventor: Out for Blood in Silicon Valley and produced and participated in (Dis)Honesty: The Truth About Lies. In 2018 Ariely was named one of the 50 most influential living psychologists in the world.