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PERFECT COMPETITION, REALISM: Perfect competition is an idealized market structure that does NOT exist in the real world. While some real world industries might come relatively close to one or two of the four key characteristics of perfect competition, none matches all four sufficiently that they can be declared PERFECTLY competitively. Some industries come close on the large number of small firms and the identical product characteristics. A few industries have relatively good, although not perfect, information about prices and technology. However, almost all industries fall far short of the perfect mobility characteristics.

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ECONOMICS OF INFORMATION

The study of the role that information plays in the economy and in the allocation of resources, with special attention paid to efficient information search. Key topics in this area of study and analysis are asymmetric information, moral hazard, adverse selection, signalling, and screening. This study of the economics of information also provides insight into the analysis of risk and uncertainty, which are important to insurance and financial markets.

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Today, you are likely to spend a great deal of time browsing about a thrift store trying to buy either a solid oak entertainment center or a remote controlled ceiling fan. Be on the lookout for crowded shopping malls.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
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