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MARKET STRUCTURE: The manner in which a market is organized, based largely on the number of firms in the industry. The four basic market structure models are: perfect competition, monopoly, monopolistic competition, and oligopoly. The primary difference between each is the number of firms on the supply side of a market. Both perfect competition and monopolistic competition have a large number of relatively small firms selling output. Oligopoly has a small number of relatively large firms. And monopoly has a single firm.
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SCREENING When confronted by asymmetric information, the use of small bits of information, or indicators, that suggest more comprehensive information. Screening occurs when those with limited information try to identify indicators suggesting more complete information. It is used in markets with adverse selection and moral hazard, especially in labor markets and in the provision of insurance. Common methods of screening include aptitude tests, affiliations, past behavior, and personal characteristics. A related method is signalling.
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GREEN LOGIGUIN
[What's This?]
Today, you are likely to spend a great deal of time at an auction wanting to buy either a computer that can play video games and burn DVDs or a black duffle bag with velcro closures. Be on the lookout for jovial bank tellers.
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This isn't me! What am I?
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Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.
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"A genius is a talented person who does his homework." -- Thomas Edison
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ARCH
Autoregressive Conditional Heteroskedasticity
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