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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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DETERMINANT

This has one of two somewhat related meanings. First, it refers to a ceteris paribus factor that is held constant when a curve or graphical relation between two other variables is constructed. Second, it refers to a known directional change in a variable resulting from the disruption of an equilibrium that is identified using comparative statics.

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Today, you are likely to spend a great deal of time strolling through a department store looking to buy either a weathervane with a chicken on top or a flower arrangement with daisies and carnations for your uncle. Be on the lookout for letters from the Internal Revenue Service.
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Paper money used by the Commonwealth of Massachusetts prior to the U.S. Revolutionary War, which was issued against the dictates of Britain, was designed by patriot and silversmith, Paul Revere.
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