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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 WEDGE The difference between demand price and supply price that is created when a tax is imposed on a market. Placing a tax on a market disrupts what otherwise would be an equilibrium equality between demand price and supply price. A tax wedge results because the tax is included in the demand price paid by buyers but not in the supply price received by sellers. With standard demand (negative slope) and supply (positive slope) curves, the incidence of the tax (who pays) is divided between buyers and sellers.
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WHITE GULLIBON
[What's This?]
Today, you are likely to spend a great deal of time watching infomercials trying to buy either a wall poster commemorating the 2000 Olympics or a flower arrangement with a lot of roses for your grandmother. Be on the lookout for slow moving vehicles with darkened windows.
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A half gallon milk jug holds about $50 in pennies.
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"My future starts when I wake up every morning . . . Every day I find something creative to do with my life. " -- Miles Davis, musician
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NORC
National Opinion Research Center
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