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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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VARIABLE INPUT An input whose quantity can be changed in the time period under consideration. The most common example of a variable input is labor. Variable inputs provide the means used by a firm to control short-run production. The alternative to variable input is fixed input. A fixed input, like capital, provides the capacity constraint in production. As larger quantities of a variable input, like labor, are added to a fixed input like capital, the variable input becomes less productive, which is the law of diminishing marginal returns.
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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 decorative celebrity figurines or a flower arrangement with anything but tulips for your grandfather. Be on the lookout for defective microphones.
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This isn't me! What am I?
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The average bank teller loses about $250 every year.
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"If you don't know where you are going, any road will get you there." -- Lewis Carroll, writer
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AACCLA
Association of American Chambers of Commerce in Latin America
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