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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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ECONOMIST A person who specializes in economics, especially through the study of economic theories and the accumulated body of economic knowledge. Economists spend their working lives at universities, colleges, government agencies, banks, insurance companies, and multinational corporations. They study economic events, analyze government policies, undertake scientific investigations, and of course pass along economic information to eager students and others seeking enlightenment.
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
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"Cherish your visions and your dreams as they are the children of your soul; the blue prints of your ultimate achievements." -- Napoleon Hill, Author
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AR
Average Revenue, Autoregressive
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