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MARGINAL COST: The change in total cost (or total variable cost) resulting from a change in the quantity of output produced by a firm in the short run. Marginal cost indicates how much total cost changes for a give change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (remember total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. Marginal cost, usually abbreviated MC, is found by dividing the change in total cost (or total variable cost) by the change in output.

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AVERAGE REVENUE CURVE, MONOPOLY

A curve that graphically represents the relation between average revenue received by a monopoly for selling its output and the quantity of output sold. Because average revenue is essentially the price of a good, the average revenue curve is also the demand curve for a monopoly's output.

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Today, you are likely to spend a great deal of time watching the shopping channel hoping to buy either a dozen high trajectory optic orange golf balls or a large red and white striped beach towel. Be on the lookout for cardboard boxes.
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Okun's Law posits that the unemployment rate increases by 1% for every 2% gap between real GDP and full-employment real GDP.
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