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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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DEMAND DETERMINANTS

Five ceteris paribus factors that affect demand, but which are assumed constant when a demand curve is constructed. They are buyers' income, buyers' preferences, other prices, buyers' expectations, and number of buyers. Changes in the demand determinants cause shifts of the demand curve and disruptions of the market.

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Today, you are likely to spend a great deal of time looking for a downtown retail store seeking to buy either a set of tires or a birthday gift for your grandfather. Be on the lookout for gnomes hiding in cypress trees.
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General Electric is the only stock from the original 1896 Dow Jones Industrial Average remaining in the current index.
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