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OLIGOPOLY CHARACTERISTICS: The three most important characteristics of oligopoly are: (1) an industry dominated by a small number of large firms, (2) firms sell either identical or differentiated products, and (3) the industry has significant barriers to entry.

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PERFECTLY INELASTIC

An elasticity alternative in which changes in one variable (usually price) do NOT cause any changes in another variable (usually quantity). Quantity is totally, completely unresponsive to price. Quantity just does not change, regardless of changes in price. This characterization of elasticity is most important for the price elasticity of demand and the price elasticity of supply. Perfectly inelastic is one of five elasticity alternatives. The other four are perfectly elastic, relatively elastic, relatively inelastic, and unit elastic.

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APLS

ORANGE REBELOON
[What's This?]

Today, you are likely to spend a great deal of time touring the new suburban shopping complex hoping to buy either a how-to book on home repairs or a large, stuffed kitty cat. Be on the lookout for telephone calls from former employers.
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This isn't me! What am I?

A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
"Everyone's got it in him, if he'll only make up his mind and stick at it. None of us is born with a stop-valve on his powers or with a set limit to his capacities. There's no limit possible to the expansion of each one of us."

-- Charles M. Schwab

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American Economic Review
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