Tyler Cowen is author of Discover Your Inner Economist: Use Incentives to Fall in Love, Survive Your Next Meeting, and Motivate Your Dentist now available in paperback. He is also Professor of Economics at George Mason University. He can be reached at tcowen@gmu.edu.

Seth Roberts, Ph.D., is the author of The Shangri-La Diet. A psychology professor at UC Berkeley, he serves on the editorial advisory board of the scientific journal Nutrition and has published dozens of scientific articles on various topics, including health, nutrition, and weight control. His work has appeared in major scientific journals such as The Lancet and Behavioral and Brain Sciences, and in Spy magazine. Articles about his work have appeared in The New York Times and Harper's. His website is sethroberts.net.

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