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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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UTILITY

The satisfaction of wants and needs obtained from the use or consumption of goods and services. The terms utility and satisfaction are, for the most part, used interchangeably in economics. The concept of utility is integral to utility analysis, consumer demand theory, and the microeconomic analysis of consumer behavior and market demand.

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Today, you are likely to spend a great deal of time searching for a specialty store trying to buy either a rechargeable battery for your computer or shoe laces for your snow boots. Be on the lookout for gnomes hiding in cypress trees.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
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