Paul Krugman, professor of economics and international affairs at Princeton University in the United States and the winner of 2008 Nobel Prize in Economics, attends a press conference after his lecture at Stockholm University, in Sweden on Dec. 8, 2008. Krugman won the Nobel Prize for for his analysis of trade patterns and location of economic activity. Nobel Prize Laureates will receive their Nobel Prize during the Nobel award ceremony in Stockholm of Sweden and Oslo of Norway on Wednesday Dec. 10, 2008. [Xinhua]