Yellen as vice-chair, by contrast with her predecessors, has acted more as an independent force within the institution. She has trying to persuade Bernanke and the rest of the committee to adopt her preferred course for monetary policy, advocating more aggressive steps to pump money into the economy to bring down unemployment. In January 2012, the Fed announced its own inflation target of two percent a year, after a long campaign by Bernanke and Yellen, who was an early supporter of inflation targeting in the face of opposition from chairman Greenspan since 1990s.