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TOTAL COST CURVE: A curve that graphically represents the relation between total cost incurred by a firm in the short-run production of a good or service and the quantity produced. The total cost curve is a cornerstone upon which the analysis of a firm's short-run production is built. It combines all of a firm's opportunity costs into a single curve, which can then be used with the firm's total revenue curve to determine profit.

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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 touring the new suburban shopping complex looking to buy either a weathervane with a horse on top or a case of blank recordable DVDs. Be on the lookout for the last item on a shelf.
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Lombard Street is London's equivalent of New York's Wall Street.
"There is no twilight zone of honesty in business. A thing is right or it's wrong. It's black or it's white. "

-- John F. Dodge, automaker

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