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VARIABLE INPUT: An input whose quantity can be changed in the time period under consideration. This should be immediately compared and contrasted with fixed input. The most common example of a variable input is labor. A variable input provides the extra inputs that a firm needs to expand short-run production. In contrast, a fixed input, like capital, provides the capacity constraint in production. As larger quantities of a variable input, like labor, are added to a fixed input like capital, the variable input becomes less productive. This is, by the way, the law of diminishing marginal returns.
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MARGINAL REVENUE, MONOPOLY The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a monopoly 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 monopoly equates marginal revenue and marginal cost.
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RED AGGRESSERINE
[What's This?]
Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club looking to buy either a wall poster commemorating next Thursday or a pair of gray heavy duty boot socks. Be on the lookout for telephone calls from former employers.
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Two and a half gallons of oil are needed to produce one automobile tire.
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"Act well at the moment, and you have performed a good action for all eternity." -- Johann Kaspar Lavater
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BEA
Bureau of Economic Analisys
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