PHILIP E. TETLOCK is the Annenberg University Professor at the University of Pennsylvania, with appointments in Wharton, psychology and political science. He is co-leader of the Good Judgment Project, a multi-year forecasting study, He is the author of three books: Expert Political Judgment: How Good Is It? How Can We Know?; (with Aaron Belkin) Counterfactual Thought Experiments in World Politics; and (with Dan Gardner) Superforecasting: The Art & Science of Prediction (forthcoming, September 2015).
His Expert Political Judgment: How Good Is It? How Can We Know? (2005) describes a twenty-year study in which 284 experts in many fields, including government officials, professors, journalists, and other, and with many opinions, from Marxists to free-marketeers, were asked to make 28,000 predictions about the future, finding that they were only slightly more accurate than chance, and worse than basic computer algorithms which was the recipient of the 2008 University of Louisville Grawemeyer Award for Ideas Improving World Order.