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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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PRIVATE SECTOR

The combination of households and businesses into a single group. It is termed the private sector to indicate that decisions are made by private individuals (either consumers or producers) in pursuit of their personal self-interests. The contrasting phrase is public sector, in which decisions are made by governments on behalf of the public.

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Today, you are likely to spend a great deal of time wandering around the downtown area hoping to buy either a coffee table shaped like the state of Florida or storage boxes for your summer clothes. Be on the lookout for door-to-door salesmen.
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It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
"Concentration is the secret of strength in politics, in war, in trade, in short in all management of human affairs. "

-- Ralph Waldo Emerson, philosopher, poet

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