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ENDOGENOUS VARIABLE: A variable that is identified within the workings of the model. Also termed a dependent variable, an endogenous 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, 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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Today, you are likely to spend a great deal of time watching the shopping channel wanting to buy either a New York Yankees baseball cap or several magazines on home repairs. Be on the lookout for cardboard boxes.
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Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.
"Be willing to have it so. Acceptance of what has happened is the first step to overcoming the consequences of any misfortune."

-- William James, Psychologist

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