Paul Krugman is the recipient of the 2008 Nobel Prize in Economics. He writes a twice-weekly op-ed column for the New York Times and a blog named for his 2007 book "The Conscience of a Liberal." He teaches economics at Princeton University. His books include "The Accidental Theorist," "The Conscience of a Liberal," "Fuzzy Math," "The Great Unraveling," "Peddling Prosperity," and two editions of "The Return of Depression Economics," both national bestsellers.