Tyler Cowen is Holbert C. Harris Professor of Economics at George Mason University.  He writes regularly for the popular press, including The New York Times and recently wrote a book called The Great Stagnation: How America Ate All the Low-Hanging Fruit of Modern History, Got Sick, and Will (Eventually) Feel Better, which has been described as the most influential non-fiction book of the year.  A recent Economist poll cited him as one of the most influential economists of the last decade and recently Bloomberg BusinessWeek dubbed him “America’s Hottest Economist.”  He also co-writes the blog “Marginal Revolution.”