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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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MARGINAL FACTOR COST, MONOPSONY

The change in total factor cost resulting from a change in the quantity of factor input employed by a monopsony. Marginal factor cost, abbreviated MFC, indicates how total factor cost changes with the employment of one more input. It is found by dividing the change in total factor cost by the change in the quantity of input used. Marginal factor cost is compared with marginal revenue product to identify the profit-maximizing quantity of input to hire.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius trying to buy either a replacement battery for your pocket calculator or a how-to book on home remodeling. Be on the lookout for crowded shopping malls.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"Lord, where we are wrong, make us willing to change; where we are right, make us easy to live with. "

-- Peter Marshall, US Senate chaplain

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