Janet Yellen

Federal Reserve Board Governor Daniel Tarullo (L) administers the oath of office to new Federal Reserve Board Chairwoman Janet Yellen (R) at the Federal Reserve Board in Washington, February 3, 2014. (REUTERS/Jim Bourg)

Federal Reserve Board Governor Daniel Tarullo (L) administers the oath of office to new Federal Reserve Board Chairwoman Janet Yellen as her husband George Akerlof (R) looks on at the Federal Reserve Board in Washington, February 3, 2014. (REUTERS/Jim Bourg)

Federal Reserve Board Governor Daniel Tarullo (L) applauds new Federal Reserve Board Chairwoman Janet Yellen after administering the oath of office to Yellen at the Federal Reserve Board in Washington, February 3, 2014. (REUTERS/Jim Bourg)

Janet Yellen smiles after being sworn in as Federal Reserve Board Chair, Monday, Feb. 3, 2014, in Washington, Yellen is the first woman to lead the Federal Reserve. (AP Photo/Charles Dharapak)

Janet Yellen, President Barack Obama's nominee to lead the U.S. Federal Reserve, is sworn in to testify at her U.S. Senate Banking Committee confirmation hearing in Washington in this November 14, 2013, file photo. The U.S. Senate, kicking off its 2014 session on January 6, 2014, intends to waste no time making history as it moves to approve Janet Yellen to be the first woman to head the Federal Reserve. (REUTERS/Jason Reed/Files)

U.S. President Barack Obama and outgoing Federal Reserve Chairman Ben Bernanke (R) applaud after Obama nominated Janet Yellen (C) to serve as the next head of the Federal Reserve at the White House in Washington October 9, 2013. U.S Federal Reserve Vice Chair Yellen said on Wednesday she would do her utmost to promote maximum employment, stable prices, and a strong and stable financial system if she is confirmed by the U.S. Senate to run the central bank.The nomination puts Yellen on course to be the first woman to lead the institution in its 100-year history. REUTERS/Kevin Lamarque

U.S. President Barack Obama (C) announces his nomination of Janet Yellen (L) to head the Federal Reserve at the White House in Washington October 9, 2013. U.S Federal Reserve Vice Chair Yellen said on Wednesday she would do her utmost to promote maximum employment, stable prices, and a strong and stable financial system if she is confirmed by the U.S. Senate to run the central bank.The nomination puts Yellen on course to be the first woman to lead the institution in its 100-year history. Also pictured is current Fed Chairman Ben Bernanke (R). REUTERS/Jonathan Ernst

U.S. President Barack Obama (L) looks on after announcing his nomination of Janet Yellen (R) to head the Federal Reserve at the White House in Washington October 9, 2013. U.S Federal Reserve Vice Chair Yellen said on Wednesday she would do her utmost to promote maximum employment, stable prices, and a strong and stable financial system if she is confirmed by the U.S. Senate to run the central bank.The nomination puts Yellen on course to be the first woman to lead the institution in its 100-year history. REUTERS/Jonathan Ernst

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. U.S. President Barack Obama will nominate Yellen to be the next head of the U.S. central bank on October 9, 2013, a White House official said October 8. (REUTERS/Robert Galbraith)

Federal Reserve Vice Chair Janet Yellen addresses the 29th National Association for Business Economics Policy Conference in Washington in this file photo from March 4, 2013. Former Treasury Secretary Lawrence Summers' withdrawal from consideration to succeed Federal Reserve Chairman Ben Bernanke turns the focus on Janet Yellen. (REUTERS/Gary Cameron)

Federal Reserve Board Chairman Ben Bernanke (C) poses with board members at a two-day meeting of the Federal Open Market Committee, the Federal Reserve's interest rate-setting body, in Washington in this March 17, 2009 picture released on March 19, 2009. The Federal Reserve on Wednesday announced the purchase of longer-dated Treasury securities to help end a deepening U.S. Recession. Front row (L-R): Governor Elizabeth Duke, Governor Kevin Warsh, Chairman Bernanke, Vice Chairman Donald Kohn, Governor Daniel Tarullo. Back row (L-R): New York Fed President William Dudley, Boston Fed President Eric Rosengren, St. Louis Fed President James Bullard, Chicago Fed President Charles Evans, Kansas City Fed President Thomas Hoenig, Dallas Fed President Richard Fisher, Minneapolis Fed President Gary Stern, Cleveland Fed President Sandra Pianalto, Atlanta Fed President Dennis Lockhart, Philadelphia Fed President Charles Plosser, Richmond Fed President Jeffrey Lacker, San Francisco Fed President Janet Yellen. (REUTERS/Joe Pavel/Federal Reserve Board)

Janet Yellen speaks at a White House news conference December 20 where she was named by President-Clinton to be the new head of the White House Council of Economic Advisors, a position which requires Senate confirmation. Yellen, a former academic, is currently a member of the Federal Reserve Board. (Gary Hershorn / Reuters)