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PERFECT COMPETITION, REVENUE DIVISION: The marginal approach to analyzing a perfectly competitive firm's short-run profit maximizing production decision can be used to identify the division of total revenue among variable cost, fixed cost, and economic profit. The U-shaped cost curves used in this analysis provide all of the information needed on the cost side of the firm's decision. The demand curve facing the firm (which is also the firm's average revenue and marginal revenue curves) provides all of the information needed on the revenue side.

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SUBSTITUTE-IN-CONSUMPTION

One of two (or more) goods that provide the same basic satisfaction of a want or need when consumed. A substitute-in-consumption is one of two alternatives falling within the other prices determinant of demand. The other is a complement-in-consumption. An increase in the price of one substitute good causes an increase in demand for the other. A substitute-in-consumption has a positive cross elasticity of demand.

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Today, you are likely to spend a great deal of time browsing about a thrift store hoping to buy either software that won't crash your computer or any book written by Stephan King. Be on the lookout for jovial bank tellers.
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Three-forths of the gold mined each year is used to manufacture jewelry.
"Executives who get there and stay suggest solutions when they present the problems. "

-- Malcolm Forbes, business executive

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