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PERFECT COMPETITION, SHUTDOWN: A perfectly competitive firm is presumed to shutdown production and produce no output in the short run, if price is less than average variable cost. This is one of three short-run production alternatives facing a firm. The other two are profit maximization (if price exceeds average total cost) and loss minimization (if price is greater than average variable cost but less than average total cost).

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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 wandering around the downtown area looking to buy either a handcrafted bird feeder or a New York Yankees baseball cap. Be on the lookout for celebrities who speak directly to you through your television.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
"I do the best I know how, the very best I can, and I mean to keep doing so until the end. "

-- Abraham Lincoln, 16th US president

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