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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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AVERAGE REVENUE AND MARGINAL REVENUE A mathematical connection between average revenue and marginal revenue stating that the change in the average revenue depends on a comparison between average revenue and marginal revenue. For perfect competition, with no market control, marginal revenue is equal to average revenue, and average revenue does not change. For monopoly and other firms with market control, marginal revenue is less than average revenue, and average revenue falls.
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ORANGE REBELOON
[What's This?]
Today, you are likely to spend a great deal of time flipping through the yellow pages hoping to buy either storage boxes for your winter clothes or several magazines on time travel. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
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"Success doesn't come to you . . . you go to it " -- Marva Collins, Educator
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ITO
International Trade Organization
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