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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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TAX MULTIPLIER

A measure of the change in aggregate production caused by changes in government taxes. The tax multiplier is the negative marginal propensity to consume times one minus the slope of the aggregate expenditures line. The simple tax multiplier includes ONLY induced consumption. More complex tax multipliers include other induced components. Two related multipliers are the expenditures multiplier, which measures the change in aggregate production caused by changes in an autonomous aggregate expenditure, and the balanced-budget multiplier which measures the change in aggregate production from equal changes in both taxes and government purchases.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time flipping through the yellow pages seeking to buy either a T-shirt commemorating yesterday or a pair of handcrafted oven mitts. Be on the lookout for telephone calls from former employers.
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Two and a half gallons of oil are needed to produce one automobile tire.
"What you get by achieving your goals is not as important as what you become by achieving your goals."

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