Dan Ariely is an Israeli-American author and professor of business administration at Duke University. He is recognized for his work in behavioral science and has founded several companies that apply insights from this field. Ariely is best known for his bestselling books exploring human irrationality and dishonesty. His three New York Times bestsellers are Predictably Irrational, The Upside of Irrationality, and The Honest Truth about Dishonesty. His work has reached audiences beyond academia through various media adaptations, including the 2015 documentary (Dis)Honesty: The Truth About Lies, which he co-produced, and the 2023 NBC television series The Irrational, which was inspired by his research and his book Predictably Irrational. From June 2012 to September 2022, Ariely wrote an advice column called "Ask Ariely" for The Wall Street Journal, where he applied behavioral science principles to readers' everyday questions.