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INCREASING-COST INDUSTRY: A perfectly competitive industry with a positively-sloped long-run industry supply curve that results because expansion of the industry causes higher production cost and resource prices. For an increasing-cost industry the entry of new firms, prompted by an increase in demand, causes the long-run average supply curve of each firm to shift upward, which increases the minimum efficient scale of production.

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MARGINAL REVENUE, PERFECT COMPETITION

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a perfectly competitive 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 perfectly competitive firm equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time strolling through a department store seeking to buy either throw pillows for your living room sofa or a hepa filter for your furnace. Be on the lookout for infected paper cuts.
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On a typical day, the United States Mint produces over $1 million worth of dimes.
"You don't have to be a fantastic hero to do certain things - to compete. You can be just an ordinary chap, sufficiently motivated to reach challenging goals."

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