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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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COMPLEMENT-IN-CONSUMPTION

One of two (or more) goods that provide satisfaction of a want or need when consumed together. A complement-in-consumption is one of two alternatives falling within the other prices determinant of demand. The other is a substitute-in-consumption. An increase in the price of one complement good causes a decrease in demand for the other. A complement-in-consumption has a negative cross elasticity of demand.

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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time going from convenience store to convenience store seeking to buy either a set of luggage with wheels or a birthday gift for your aunt. Be on the lookout for fairy dust that tastes like salt.
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John Maynard Keynes was born the same year Karl Marx died.
"Defeat is simply a signal to press onward."

-- Helen Keller, lecturer, author

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Council for Mutual Economic Assistance
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