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ARC ELASTICITY: The average elasticity for discrete changes in two variables, A and B. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of the initial and ending values of each variable, rather than only initial values. Arc elasticity is generally calculated using the midpoint formula. Arc elasticity should be compared with point elasticity. For infinitesimally small changes in variables A and B, arc elasticity is the same as point elasticity.

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EXPENDITURES MULTIPLIER

A measure of the change in aggregate production caused by changes in an autonomous expenditure. The expenditures multiplier is the inverse of one minus the slope of the aggregate expenditures line. The simple expenditures multiplier includes ONLY induced consumption. More complex expenditures multipliers include other induced components. Two related multipliers are the tax multiplier, which measures the change in aggregate production caused by changes in taxes, and the balanced-budget multiplier which measures the change in aggregate production from equal changes in both taxes and government purchases.

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Today, you are likely to spend a great deal of time searching for rummage sales hoping to buy either a how-to book on wine tasting or a bookshelf that will fit in your closet. Be on the lookout for mail order catalogs with hidden messages.
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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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