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RIGID PRICES: The proposition that some prices adjust slowly in response to market shortages or surpluses. This condition is most important for macroeconomic activity in the short run and short-run aggregate market analysis. In particular, rigid (also termed inflexible or sticky) prices are a key reason underlying the positive slope of the short-run aggregate supply curve. Prices tend to be the most rigid in resource markets, especially labor markets, and the least rigid in financial markets, with product markets falling somewhere in between.
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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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WHITE GULLIBON
[What's This?]
Today, you are likely to spend a great deal of time touring the new suburban shopping complex hoping to buy either a genuine down-filled comforter or a 200-foot blue garden hose. Be on the lookout for door-to-door salesmen.
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Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.
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"Divide each difficulty into as many parts as is feasible and necessary to resolve it." -- Rene Descartes
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APT
Arbitrage Pricing Theory
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