This year's Nobel Prize in Economic Sciences has gone to Paul Krugman for his theories on how economies of scale affect international trade. Krugman, a professor of economics and international affairs at the Woodrow Wilson School at Princeton University and a columnist for The New York Times, says he was stark naked, about to step into the shower at 6:40 a.m. when his cell phone rang with the news. He called the award "an awesome surprise."