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SAVING-INVESTMENT MODEL: A model used to identify equilibrium in Keynesian economics based on injections (investment, I) and leakages (saving, S) for the two basic sectors (household and business). Equilibrium is achieved at the intersection of the saving line, S, and the investment line, I.

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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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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time surfing the Internet trying to buy either a birthday greeting card for your father or a T-shirt commemorating the first day of spring. Be on the lookout for small children selling products door-to-door.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"Do not go where the path may lead, go instead where there is no path and leave a trail."

-- Ralph Waldo Emerson

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