European Central Bank

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The Euro sculpture is reflected in a puddle on the lid of a bin that stands in the Frankfurt Occupy camp at the European Central Bank in Frankfurt, Germany, Wednesday, Nov.30, 2011. (AP Photo/Michael Probst)

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Jean Claude Trichet, president of the European Central Bank, whose position has less direct authority than that of the U.S. Federal Reserve chairman, has had to build consensus among the member nations of the eurozone in the debt crisis. He steps down this month after eight years at the ECB's helm. (Associated Press)

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European Central Bank head Jean-Claude Trichet (right) listens to Mario Draghi, next to take the helm of the bank, during a conference on the European debt crisis on Monday in Paris. Mr. Draghi called for a "quantum" leap toward economic integration. (Associated Press)

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Federal Reserve chairman Paul Bernanke (right) and Jean-Claude Trichet, of France, president of the European Central Bank, take a stroll Aug. 26, 2011, on the veranda of the Jackson Lake Lodge before the morning session of the Economic Policy Symposium at Jackson Hole in Moran, Wyo. (Associated Press)

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Federal Reserve Chairman Ben Bernanke delivers his keynote speech at the sixth European Central Bank Central Banking conference in Frankfurt, Friday Nov. 19, 2010. (AP Photo/Kai Pfaffenbach,Pool)

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Belgian Finance Minister Didier Reynders, center, speaks with European Central Bank President Jean Claude Trichet, left, and European Commission for Economy Olli Rehn during a financial task force meeting at the EU Council building in Brussels on Monday, Sept. 6, 2010. (AP Photo/Virginia Mayo)

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The sun is reflected on the facade of the European Central Bank Tower, seen through the euro symbol, in Frankfurt, Germany, in August 2009. (AP Photo/Daniel Roland, File)