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VALUE IN EXCHANGE: The ability to trade an item, especially money, for other goods and services that can then be used to satisfy wants and needs. Value in exchange means that value, that is satisfaction, is obtained indirectly through the acquisition of something else. For an item to have value in exchange it need NOT have value in use, value obtained directly from the consumption of a good or service.

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ARC ELASTICITY

The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.

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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway wanting to buy either a set of serrated steak knives, with durable plastic handles or a pair of blue silicon oven mitts. Be on the lookout for jovial bank tellers.
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