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ABSTRACTION: Simplifying the complexities of the real world by ignoring (hopefully) unimportant details while doing economic analysis. Abstraction is often criticized because it's, well, it's JUST NOT REALISTIC. However, when done correctly (ignoring things that JUST DON'T MATTER), then the pursuit of knowledge is greatly enhanced by abstraction. For example, when travelling cross country along a high-speed interstate highway, a paper road map is a handy tool. It shows towns and cities along the way, the major intersections, rest stop locations, and other important points of interest. However, it ignores unimportant details. It doesn't realistically show the location of every tree, bush, or blade of grass. Why bother? This information won't enhance your road trip.
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PERFECT COMPETITION An ideal market structure characterized by a large number of small firms, identical products sold by all firms, freedom of entry into and exit out of the industry, and perfect knowledge of prices and technology. This is one of four basic market structures. The other three are monopoly, oligopoly, and monopolistic competition. Perfect competition is an idealized market structure that is not observed in the real world. While unrealistic, it does provide an excellent benchmark that can be used to analyze real world market structures. In particular, perfect competition efficiently allocates resources.
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WHITE GULLIBON
[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 genuine down-filled comforter or a 200-foot blue garden hose. Be on the lookout for door-to-door salesmen.
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This isn't me! What am I?
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The penny is the only coin minted by the U.S. government in which the "face" on the head looks to the right. All others face left.
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"Divide each difficulty into as many parts as is feasible and necessary to resolve it." -- Rene Descartes
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CBOE
Chicago Board Options Exchange
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