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HHI: The common abbreviation for the Herfindahl-Hirshman index (or the Herfindahl index), which is 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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SLOPE, SHORT-RUN AGGREGATE SUPPLY CURVE

The positive slope of the short-run aggregate supply curve, reflecting the direct relation between the price level and real production, results for three primary reasons--inflexible resources, frictional and structural unemployment, and purchasing power imbalances.

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YELLOW CHIPPEROON
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Today, you are likely to spend a great deal of time at the confiscated property police auction hoping to buy either a battery-powered, rechargeable vacuum cleaner or a remote controlled World War I bi-plane. Be on the lookout for poorly written technical manuals.
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The portion of aggregate output U.S. citizens pay in taxes (30%) is less than the other six leading industrialized nations -- Britain, Canada, France, Germany, Italy, or Japan.
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