What would you ask a famous economist?

Tyler Cowen, economist, cultural omnivore, and proprietor of Marginal Revolution, has written a new book called "Discover Your Inner Economist: Use Incentives to Fall in Love, Survive Your Next Meeting, and Motivate Your Dentist." As an incentive for people to pre-order the book, he has offered to create a personalized podcast for anyone that pre-orders before Thursday, July 26th.

I'm planning on taking him up on the offer and wondered what you would ask a famous economist?