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PARIS - SEPTEMBER 14: American economist and Nobel Prize winner 2001 Joseph Stiglitz poses while in Paris,France to promote his book on the 14th of September 2006. (Photo by Ulf Andersen/Getty Images)

PARIS - SEPTEMBER 14: American economist and Nobel Prize winner 2001 Joseph Stiglitz poses while in Paris,France to promote his book on the 14th of September 2006. (Photo by Ulf Andersen/Getty Images)