Once the federal funds rate reached (approximately) zero, which happened in December 2008, what options were still

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Once the federal funds rate reached (approximately) zero, which happened in December 2008, what options were still open to the Fed. What did it actually do?
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Economics Principles and Policy

ISBN: 978-0538453653

12th edition

Authors: William J. Baumol, Alan S. Blinder

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