Topic - Christopher Sims

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Associated Press

Per Krusell (left) and Staffan Normark of the Royal Swedish Academy of Sciences announce during a press conference in Stockholm on Monday, Oct. 10, 2011, that Americans Thomas Sargent (top right) and Christopher Sims (top left) have won the 2011 Nobel Memorial Prize in Economic Sciences. (AP Photo/Fredrik Sandberg/ SCANPIX)

2 Americans win Nobel Prize in economics

By Geoff Mulvihill and Paul Wiseman - Associated Press