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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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INFLATIONARY GAP, KEYNESIAN MODEL

The difference between equilibrium aggregate production achieved in the Keynesian model and full-employment aggregate production that occurs when equilibrium aggregate production is greater than full-employment aggregate production. An inflationary gap, also termed an expansionary gap, is associated with a business-cycle expansion. The prescribed Keynesian remedy for an inflationary gap is contractionary fiscal policy. This is one of two alternative output gaps that can occur when equilibrium generates production that differs from full employment. The other is a recessionary gap.

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Today, you are likely to spend a great deal of time at a dollar discount store trying to buy either car battery jumper cables or a dozen high trajectory optic orange golf balls. Be on the lookout for letters from the Internal Revenue Service.
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Junk bonds are so called because they have a better than 50% chance of default, carrying a Standard & Poor's rating of CC or lower.
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