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PLANNING PERIOD: The period of time in which a firm selects the profit-maximizing plant size in the long run when all inputs, especially capital, are variable. This is, in other words, another term for the long run, but applied to the adjustment using the long-run average cost curve.

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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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Today, you are likely to spend a great deal of time flipping through mail order catalogs trying to buy either arch supports for your shoes or an AC adapter that works with your MPG player. Be on the lookout for strangers with large satchels of used undergarments.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
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NAFTA
North America Free Trade Agreement
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