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DEPENDENT VARIABLE: A variable that is identified within the workings of the model. Also termed an endogenous variable, a dependent variable is in essence the "output" of the model. It should be compared with an exogenous variable this is the "input" of the model.

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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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Today, you are likely to spend a great deal of time searching the newspaper want ads trying to buy either a remote controlled train set or a genuine down-filled snow parka. Be on the lookout for gnomes hiding in cypress trees.
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The average bank teller loses about $250 every year.
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