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MARGINAL EFFICIENCY OF INVESTMENT: The anticipated rate of return on a capital investment project undertaken by a business firm. Businesses typically compare the marginal efficiency of investment, abbreviated MEI, on physical capital with interest rate returns on financial capital when deciding to undertake an investment project. Because different investment projects have different returns, businesses often have a range of alternatives projects from which to choose. Combining all projects throughout the economy gives rise to an investment demand curve relating investment expenditures to the interest rate.

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SLOPE, SHORT-RUN AGGREGATE SUPPLY CURVE

The positive slope of the short-run aggregate supply curve, reflecting the direct relation between the price level and real production, results for three primary reasons--inflexible resources, frictional and structural unemployment, and purchasing power imbalances.

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[What's This?]

Today, you are likely to spend a great deal of time watching infomercials looking to buy either a how-to book on the art of negotiation or a flower arrangement for your aunt. Be on the lookout for celebrities who speak directly to you through your television.
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Natural gas has no odor. The smell is added artificially so that leaks can be detected.
"Chance favors only the prepared mind."

-- Louis Pasteur, biologist

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Arbitrage Pricing Theory
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