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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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DISECONOMIES OF SCALE Increasing long-run average cost that occurs as a firm increases all inputs and expands its scale of production. Diseconomies of scale result from decreasing returns to scale and are graphically illustrated by a positively-sloped long-run average cost curve. Diseconomies of scale usually occur for relatively large levels of production and overwhelm economies of scale that occurs at relatively small production levels. Together, economies of scale and diseconomies of scale create a U-shaped long-run average cost curve.
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BROWN PRAGMATOX
[What's This?]
Today, you are likely to spend a great deal of time at a flea market seeking to buy either a travel case for you toothbrush or a looseleaf notebook binder. Be on the lookout for letters from the Internal Revenue Service.
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The average bank teller loses about $250 every year.
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"Nobody can be successful unless he loves his work. " -- David Sarnoff, TV pioneer
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NBER
National Bureau of Economic Research
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