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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's 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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SHORT RUN, MICROECONOMICS

In terms of the microeconomic analysis of production and supply, a period of time in which at least one input under the control of a firm used in the production process is variable and at least one input is fixed. In the short run, the variable input is usually labor and the fixed input is capital. The short-run analysis of production reveals the law of diminishing marginal returns and provides an understanding of the upward-sloping supply curve and the law of supply. This is one of four production time periods used in the study of microeconomics. The other three are long run, very long run, and very short run (or market period). The short run is also a time period designation used in the macroeconomic analysis of business cycles.

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Today, you are likely to spend a great deal of time at a going out of business sale looking to buy either a printer that works with your stockpile of ink cartridges or income tax software. Be on the lookout for telephone calls from former employers.
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
"Nothing great has ever been achieved except by those who dared believe that something inside them was superior to circumstances. "

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