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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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AGGREGATE SUPPLY DETERMINANTS

An assortment of ceteris paribus factors that affect short-run and long-run aggregate supply, but which are assumed constant when the short-run and long-run aggregate supply curves are constructed. Changes in any of the aggregate supply determinants cause the short-run and/or long-run aggregate supply curves to shift. While a wide variety of specific ceteris paribus factors can cause the aggregate supply curves to shift, they are commonly grouped into three broad categories--resource quantity, resource quality, and resource price.

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Today, you are likely to spend a great deal of time going from convenience store to convenience store trying to buy either 500 feet of telephone cable or a package of 4 by 6 index cards, the ones with lines. Be on the lookout for vindictive digital clocks with revenge on their minds.
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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.
"It is not because things are difficult that we do not dare; it is because we do not dare that they are difficult. "

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