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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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PERFECT COMPETITION, LONG-RUN ADJUSTMENT A perfectly competitive industry undertakes a two-part adjustment to equilibrium in the long run. One is the adjustment of each perfectly competitive firm to the appropriate factory size that maximizes long-run profit. The other is the entry of firms into the industry or exit of firms out of the industry, to eliminate economic profit or economic loss. The end result of this long-run adjustment is a multi-faceted equilibrium condition that price is equal to marginal cost and average cost (both short run and long run).
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time watching the shopping channel wanting to buy either a bottle of blackcherry flavored spring water or a travel case for you toothbrush. Be on the lookout for a thesaurus filled with typos.
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Post WWI induced hyperinflation in German in the early 1900s raised prices by 726 million times from 1918 to 1923.
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"Believe and act as if it were impossible to fail." -- Charles F. Kettering
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FTSE-100
Financial Times Stock Exchange 100 stock index (UK)
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