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OLIGOPOLY, CONCENTRATION: Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.

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INTEREST RATES, AGGREGATE DEMAND DETERMINANT

One of several specific aggregate demand determinants assumed constant when the aggregate demand curve is constructed, and that shifts the aggregate demand curve when it changes. An increase in interest rates cause a decrease (leftward shift) of the aggregate curve. A decrease in interest rates an increase (rightward shift) of the aggregate curve. Other notable aggregate demand determinants include the federal deficit, inflationary expectations, and the money supply.

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Today, you are likely to spend a great deal of time lost in your local discount super center looking to buy either a black duffle bag with velcro closures or any book written by Isaac Asimov. Be on the lookout for infected paper cuts.
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A communal society, a prime component of Karl Marx's communist philosophy, was advocated by the Greek philosophy Plato.
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