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REALISM OF PERFECT COMPETITION: 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 a one or two of the four key characteristics of perfect competition, none matches all four sufficiently that we can declare a perfectly competitively industry. 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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PERFECT COMPETITION, LONG-RUN ADJUSTMENT A perfectly competitive industry undertakes a two-part adjustment to equilibrium in the long run. One is the adjustment of each perfectly competitive firm to the appropriate factory size that maximizes long-run profit. The other is the entry of firms into the industry or exit of firms out of the industry, to eliminate economic profit or economic loss. The end result of this long-run adjustment is a multi-faceted equilibrium condition that price is equal to marginal cost and average cost (both short run and long run).
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YELLOW CHIPPEROON
[What's This?]
Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club trying to buy either car battery jumper cables or a dozen high trajectory optic orange golf balls. Be on the lookout for defective microphones.
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On a typical day, the United States Mint produces over $1 million worth of dimes.
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"After climbing a great hill, one finds many more hills to climb. " -- Nelson Mandela, president of South Africa
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GDI
Gross Domestic Income
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