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MARGINAL REVENUE CURVE, PERFECT COMPETITION: A curve that graphically represents the relation between the marginal revenue received by a perfectly competitive firm for selling its output and the quantity of output sold. Because a perfectly competitive firm is a price taker and faces a horizontal demand curve, its marginal revenue curve is also horizontal and coincides with its average revenue (and demand) curve. A perfectly competitive firm maximizes profit by producing the quantity of output found at the intersection of the marginal revenue curve and marginal cost curve.

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CHANGE IN SUPPLY

A shift of the supply curve caused by a change in one of the supply determinants. A change in supply is caused by any factor affecting supply EXCEPT price. A related, but distinct, concept is a change in quantity supplied.

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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers hoping to buy either a replacement remote control for your stereo system or a computer that can play video games and burn DVDs. Be on the lookout for jovial bank tellers.
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It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
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