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PERFECT PRICE DISCRIMINATION: A form of price discrimination in which a seller charges the highest price that buyers are willing and able to pay for each quantity of output sold. This is also termed first-degree price discrimination because the seller is able to extract ALL consumer surplus from the buyers. This is one of three price discrimination degrees. The others are second-degree price discrimination and third-degree price discrimination.

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MARGINAL PROPENSITY TO INVEST

The change in business investment expenditures induced by a change in income or production (national income or gross domestic product). The marginal propensity to invest (abbreviated MPI) is another term for the slope of the investment line and is calculated as the change in investment divided by the change in income or production. The MPI plays a role in Keynesian economics. It augments the slope of the aggregate expenditures line and is part to the multiplier process. A related marginal measure is the marginal propensity to consume.

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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 large, stuffed kitty cat or a cross-cut paper shredder. Be on the lookout for rusty deck screws.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
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