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AGGREGATE EXPENDITURE LINE: A line representing the relation between aggregate expenditures and gross domestic product used in the Keynesian cross. The aggregate expenditure line is obtained by adding investment expenditures, government purchases, and net exports to the consumption line. As such, the slope of the aggregate expenditure line is largely based on the slope of the consumption line (which is the marginal propensity to consume), with adjustments coming from the marginal propensity to invest, the marginal propensity for government purchases, and the marginal propensity to import. The intersection of the aggregate expenditures line and the 45-degree line identifies the equilibrium level of output in the Keynesian cross.
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LAW OF DEMAND The inverse relationship between demand price and the quantity demanded, assuming ceteris paribus factors are held constant. This fundamental economic principle indicates that a decrease the price of a commodity results in an increase in the quantity of the commodity that buyers are willing and able to purchase in a given period of time, if other factors are held constant. The law of demand is one of the most important principles found in the study of economics.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
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"Man is born to live, not to prepare for life. " -- Boris Pasternak, writer
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JIE
Journal of Industrial Economics
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