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A POSTERIORI: A conclusion reached through logical reasoning based on facts and observations about the real world. This notion is closely related to the scientific verification of hypotheses and the identification of principles. A similar sounding, but opposite term is a prior, which is a unverified presumption made before an analysis is undertaken. For example, in the study of economics of crime you might assume, a priori, that people are basically "good", and conclude, a posteriori, that people are more likely to commit crimes when the threat of capture and conviction is lower.

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MONETARY POLICY

Control over the money supply and interest rates by a central bank or monetary authority to stabilize business cycles, reduce unemployment and inflation, and promote economic growth. In the United States monetary policy is undertaken by the Federal Reserve System (the Fed). In principle, Federal Reserve policy makers can use three different tools--open market operations, the discount rate, and reserve requirements--to manipulate the money supply. In practice, however, the primary tool employed is open market operations. An alternative to monetary policy is fiscal policy.

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Today, you are likely to spend a great deal of time wandering around the shopping mall trying to buy either storage boxes for your winter clothes or several magazines on time travel. Be on the lookout for small children selling products door-to-door.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
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