Measures employed by governments to influence economic activity, specifically by manipulating the money supply and interest rates. Monetary and fiscal policy are two ways in which governments attempt to achieve or maintain high levels of employment, price stability, and economic growth. Monetary policy is directed by a nation's central bank. In the U.S., monetary policy is the responsibility of the Federal Reserve System, which uses three main instruments: open-market operations, the discount rate, and reserve requirements. In the post-World War II era, economists reached a consensus that, in the long run, inflation results when the money supply grows at too rapid a rate. See also monetarism.
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