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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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INVESTMENT

The sacrifice of current benefits or rewards to pursue an activity with expectations of greater future benefits or rewards. Investment is the mechanism used to increase the economy's production capabilities and generate economic growth. Investment is typically used to mean the purchase of capital by business in anticipation of profit, which is termed investment expenditures.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time surfing the Internet trying to buy either a birthday greeting card for your aunt or a wall poster commemorating the moon landing. Be on the lookout for the happiest person in the room.
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The portion of aggregate output U.S. citizens pay in taxes (30%) is less than the other six leading industrialized nations -- Britain, Canada, France, Germany, Italy, or Japan.
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