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MARGINAL PROPENSITY TO INVEST: The proportion of each additional dollar of national income that is used for investment expenditures. Or alternatively, this is the change in investment expenditures due to a change in national income. Abbreviated MPI, the marginal propensity to invest is the slope of the investment line used in the analysis of Keynesian economics. As such, it also plays a role in the slope of the aggregate expenditure line and the multiplier effect.

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WHOLESALE PRICE INDEX

An index of the prices paid by retail stores for the products they ultimately resell to consumers. The Wholesale Price Index (WPI) was the forerunner of the modern Producer Price Index (PPI) and was discontinued in 1978. Other noted price indexes used to track economic activity are the Consumer Price Index (CPI) and the GDP price deflator.

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YELLOW CHIPPEROON
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Today, you are likely to spend a great deal of time at an auction seeking to buy either storage boxes for your winter clothes or several magazines on time travel. Be on the lookout for slightly overweight pizza delivery guys.
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Woodrow Wilson's portrait adorned the $100,000 bill that was removed from circulation in 1929. Woodrow Wilson was removed from circulation in 1924.
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LRAC
Long Run Average Cost
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