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Federal Reserve Bank of Philadelphia
Business Review
Monetary policy in a liquidity trap
Michael Dotsey

In the United States, the Federal Reserve sets monetary policy by targeting the federal funds rate. This process usually involves lowering short-term interest rates when economic growth is weak and raising them when economic growth is strong. A wide class of economic models has shown that, in theory, conducting policy in this way allows the economy to employ resources efficiently. In addition, many empirical studies have shown that most central banks actually behave in this manner. In normal times, it is fairly easy for the central bank to conduct policy in this fashion. But there is one instance when conducting policy in this manner becomes problematic: when the economy finds itself in a "liquidity trap," a situation in which the short-term nominal interest rate is zero or very close to zero. In "Monetary Policy in a Liquidity Trap," Mike Dotsey analyzes the difficulties a central bank faces in such circumstances and discusses the tools available to monetary policymakers. Policy as usual is not an option, and the central bank's framework for conducting policy must change.

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Michael Dotsey, "Monetary policy in a liquidity trap" , Federal Reserve Bank of Philadelphia, Business Review, issue Q2, pages 9-15, 2010.
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Keywords: Monetary policy ; Interest rates ; Business cycles
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