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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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INFLATION CAUSES

Inflation, the persistent increase in the average price level, can be caused by an increase in aggregate demand or a decrease in aggregate supply. This suggests two basics sources, causes, or types of inflation--demand-pull inflation and cost-push inflation. While short-term bouts of inflation (up to several months) can result from anything (determinant) that might cause either increases in aggregate demand or decreases in aggregate supply, long-term inflation (a year or more) is possible ONLY through persistent increases in the money supply. As such, while demand-pull inflation and cost-push inflation are convenient ways to catalog the transmission mechanisms of inflation, the ultimate CAUSE of inflation is money.

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Today, you are likely to spend a great deal of time touring the new suburban shopping complex looking to buy either a brown leather attache case or car battery jumper cables. Be on the lookout for spoiled cheese hiding under your bed hatching conspiracies against humanity.
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