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PERFECT COMPETITION, REALISM: Perfect competition is an idealized market structure that does NOT exist in the real world. While some real world industries might come relatively close to one or two of the four key characteristics of perfect competition, none matches all four sufficiently that they can be declared PERFECTLY competitively. Some industries come close on the large number of small firms and the identical product characteristics. A few industries have relatively good, although not perfect, information about prices and technology. However, almost all industries fall far short of the perfect mobility characteristics.
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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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BLUE PLACIDOLA
[What's This?]
Today, you are likely to spend a great deal of time flipping through the yellow pages wanting to buy either software that won't crash your computer or any book written by Stephan King. Be on the lookout for slightly overweight pizza delivery guys.
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Three-forths of the gold mined each year is used to manufacture jewelry.
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"Concentration is the secret of strength in politics, in war, in trade, in short in all management of human affairs. " -- Ralph Waldo Emerson, philosopher, poet
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ROA
Return on Assets
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