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HERFINDAHL-HIRSHMAN INDEX: A measure of concentration of the production in an industry that's calculated as the sum of the squares of market shares for each firm. This is an alternative method of summarizing the degree to which an industry is oligopolistic and the relative concentration of market power held by the largest firms in the industry. The Herfindahl index gives a better indication of the relative market control of the largest firms than can be found with the four-firm and eight-firm concentration ratios.
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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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BLACK DISMALAPOD
[What's This?]
Today, you are likely to spend a great deal of time looking for a downtown retail store wanting to buy either car battery jumper cables or a dozen high trajectory optic orange golf balls. Be on the lookout for strangers with large satchels of used undergarments.
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Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
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"Progress begins with the belief that what is necessary is possible. " -- Norman Cousins, editor, writer
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ATO
At The Opening
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