Analysis: Only time will define Bernanke's crisis-era legacy at Fed

(Reuters) - Ben Bernanke did not hesitate when asked whether he was confident that his signature response to the Great Recession would work. "Well, the problem with QE is that it works in practice but it doesn't work in theory," the head of the U.S. Federal Reserve quipped earlier this month during his last public appearance. He was referring to his decision during the darkest days of the financial crisis to launch an unprecedented program of massive bond purchases, a policy known as quantitative easing, or QE. The aim was to push long-term interest rates lower given that overnight rates, the Fed's main economic lever, were already near zero.

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