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LONG-RUN EQUILIBRIUM, MONOPOLISTIC COMPETITION: Relative freedom of entry and exit ensures that, in the long run, every firm in a monopolistically competitive industry earns exactly a normal profit, receiving neither an economic profit, nor incurring an economic loss. This result is achieved because entry and exit affects the market supply curve, which affects the overall market price, each firm's demand curve, and the range or prices it can charge. Each firm's demand curve adjusts until the profit-maximizing price is exactly equal to average total cost (both short run and long run).

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MARGINAL REVENUE

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a firm equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time wandering around the downtown area looking to buy either a 50 foot extension cord or a combination CD player, clock radio, and telephone (with answering machine). Be on the lookout for high interest rates.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
"The majority of men meet with failure because of their lack of persistence in creating new plans to take the place of those that fail. "

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