Janet Yellen, vice chair of the Board of Governors of the U.S. Federal Reserve System, is shown prior to addressing the University of California Berkeley Haas School of Business in Berkeley, ... more 
Janet Yellen, vice chair of the Board of Governors of the U.S. Federal Reserve System, is shown prior to addressing the University of California Berkeley Haas School of Business in Berkeley, California in this file photo from November 13, 2012. REUTERS/Robert Galbraith/Files less 
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Reuters | Photo By ROBERT GALBRAITH / Reuters
Mon, Sep 16, 2013 6:40 PM EDT