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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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WHOLESALE PRICE INDEX

An index of the prices paid by retail stores for the products they ultimately resell to consumers. The Wholesale Price Index (WPI) was the forerunner of the modern Producer Price Index (PPI) and was discontinued in 1978. Other noted price indexes used to track economic activity are the Consumer Price Index (CPI) and the GDP price deflator.

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Today, you are likely to spend a great deal of time flipping through the yellow pages hoping to buy either a key chain with a built-in flashlight and panic button or a green and yellow striped sweater vest. Be on the lookout for letters from the Internal Revenue Service.
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A half gallon milk jug holds about $50 in pennies.
"You don't have to see the top of the staircase to take the first step.¾ "

-- Martin Luther King, civil rights leader

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