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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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CHANGE IN SUPPLY

A shift of the supply curve caused by a change in one of the supply determinants. A change in supply is caused by any factor affecting supply EXCEPT price. A related, but distinct, concept is a change in quantity supplied.

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Today, you are likely to spend a great deal of time browsing about a thrift store trying to buy either a microwave over that won't burn your popcorn or a T-shirt commemorating the first day of winter. Be on the lookout for pencil sharpeners with an attitude.
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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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Wholesale Price Index
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