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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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HERFINDAHL INDEX A measure of concentration of the production in an industry calculated as the sum of the squares of market shares for each firm. This is one method of summarizing the degree to which an industry is oligopolistic and the concentration of market control held by the largest firms in the industry. Two other measures of industry concentration are the four-firm concentration ratio and the eight-firm concentration ratio.
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BLUE PLACIDOLA
[What's This?]
Today, you are likely to spend a great deal of time at a flea market trying to buy either a pair of red and purple designer socks or a T-shirt commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki. Be on the lookout for neighborhood pets, especially belligerent parrots.
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Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.
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"A man is not finished when he is defeated. He is finished when he quits. " -- President Richard Nixon
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TOCOM
Tokyo Commodity Exchange (Japan)
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