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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, MICROECONOMICS

In terms of the microeconomic analysis of production and supply, a period of time in which all inputs under the control of a firm used in the production process are variable. In the long run, labor and capital are variable inputs. The long-run analysis of production reveals the key role played by returns to scale. This is one of four production time periods used in the study of microeconomics. The other three are short run, very long run, and very short run (or market period). The long run is also a time period designation used in the macroeconomic analysis of economic growth and full employment.

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Today, you are likely to spend a great deal of time searching for rummage sales wanting to buy either a T-shirt commemorating the 2000 Olympics or a genuine fake plastic Tiffany lamp. Be on the lookout for letters from the Internal Revenue Service.
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A communal society, a prime component of Karl Marx's communist philosophy, was advocated by the Greek philosophy Plato.
"Success is the ability to go from one failure to another with no loss of enthusiasm."

-- Sir Winston Churchill

MP
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