“‘Janet was always a phenomenal teacher — partly because she worked very, very hard at it,’ said Haas professor David Levine, whom Yellen mentored, in an August interview with The Daily Californian. ‘She thought about literally every word she would say. As she has moved up in government, this level of thoughtfulness and reflection has always been increasingly important — and as a high official of the Federal Reserve system, where literally, the placement of a comma can move the markets.’ Yellen earned a reputation as a strong advocate for the Fed’s aggressive debt-purchasing program that intended to stimulate the economy and reduce uncomfortably high unemployment levels.”
http://www.dailycal.org/2014/01/06/janet-yellen-confirmed-head-federal-reserve-3/