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Paul Robin Krugman (born February 28, 1953) is an American economist, Professor of Economics and International Affairs at the Woodrow Wilson School of Public and International Affairs at Princeton University, Centenary Professor at the London School of Economics, and an op-ed columnist for The New York Times. In 2008, Krugman won the Nobel Memorial Prize in Economic Sciences for his contributions to New Trade Theory and New Economic Geography. According to the prize Committee, the prize was given for Krugman's work explaining the patterns of international trade and the geographic concentration of wealth, by examining the effects of economies of scale and of consumer preferences for diverse goods and services.

Krugman is known in academia for his work on international economics (including trade theory, economic geography, and international finance), liquidity traps, and currency crises. Krugman is ranked among the most influential economic thinkers in the US.