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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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MARGINAL REVENUE CURVE, MONOPOLISTIC COMPETITION

A curve that graphically represents the relation between the marginal revenue received by a monopolistically competitive firm for selling its output and the quantity of output sold. Because a monopolistically competitive firm is a price maker and faces a negatively-sloped demand curve, its marginal revenue curve is also negatively sloped and lies below its average revenue (and demand) curve. A monopolistically competitive firm maximizes profit by producing the quantity of output found at the intersection of the marginal revenue curve and marginal cost curve.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors wanting to buy either a rechargeable battery for your computer or shoe laces for your snow boots. Be on the lookout for bottles of barbeque sauce that act TOO innocent.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
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UNCTAD
United Nations Conference on Trade and Development
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