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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 ANALYSIS

A basic technique used in economics that analyzes small, incremental changes in key variables. Marginal analysis is the primary analytical approached used in the study of markets, production, consumption, business cycles, and economic policies. It not only reflects how most economic decisions are made, it also lends itself to mathematical and graphical analysis.

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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway trying to buy either a cross-cut paper shredder or a birthday greeting card for your father. Be on the lookout for slow moving vehicles with darkened windows.
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On a typical day, the United States Mint produces over $1 million worth of dimes.
"Most people never run far enough on their first wind to find out they've got a second. Give your dreams all you've got and you'll be amazed at the energy that comes out of you."

-- William James, Psychologist

ISIC
International Standard Industrial Classification
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