The Royal Swedish Academy of Sciences praised Krugman for formulating a new theory to answer questions about free trade.Read more about Paul's background, at least as a New York Times columnist, here.
"What are the effects of free trade and globalization? What are the driving forces behind worldwide urbanization? Paul Krugman has formulated a new theory to answer these questions," the academy said in its citation.
"He has thereby integrated the previously disparate research fields of international trade and economic geography," it said.