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SHORT-RUN SUPPLY CURVE: For a perfectly competitive firm, the marginal cost curve that lies above the average variable cost curve. This segment of the marginal cost guides a perfectly competitive firm's profit maximizing production as it equates price to marginal cost. Because the marginal cost curve is positively sloped (due to the law of diminishing marginal returns), each firm's supply curve and the market supply curve are also positively sloped. The law of diminishing marginal returns thus provides an explanation for the law of supply. However, this only works for firms with NO market control. Monopoly, monopolistic competition, and oligopoly, with market control, do not achieve the same result.
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PERSONAL INCOME AND NATIONAL INCOME Personal income (PI) is the total income received by the members of the domestic household sector, which may or may not be earned from productive activities during a given period of time. National income (NI) is the total income earned by the citizens of the national economy resulting from their ownership of resources used in the production, which may or may not be received by members of the household sector. Personal income can be derived from national income by subtracting income earned but not received (IEBNR) and adding income received but not earned (IRBNE).
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PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time at a going out of business sale wanting to buy either a genuine down-filled comforter or a 200-foot blue garden hose. Be on the lookout for telephone calls from former employers.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
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"I don't know the key to success, but the key to failure is trying to please everybody. " -- Bill Cosby
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Dow Jones
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