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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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LONG-RUN TREND

The pattern of potential real gross domestic product of an economy based on full employment of available resources. The long-run trend is commonly represented as a positively-sloped line in a diagram depicting business-cycle phases. This slope captures the economy's expansion in its production possibilities resulting from increases in the quantity and quality of resources.

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Today, you are likely to spend a great deal of time lost in your local discount super center hoping to buy either looseleaf notebook paper or a three-hole paper punch. Be on the lookout for letters from the Internal Revenue Service.
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More money is spent on gardening than on any other hobby.
"Love looks through a telescope; envy, through a microscope. "

-- Josh Billings, humorist

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Increasing Absolute Risk Aversion
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