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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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KEYNESIAN EQUILIBRIUM

The state of macroeconomic equilibrium identified by the Keynesian model when the opposing forces of aggregate expenditures equal aggregate production achieve a balance with no inherent tendency for change. Once achieved, a Keynesian equilibrium persists unless or until it is disrupted by an outside force, especially changes in autonomous expenditures.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time at a flea market trying to buy either a lighted magnifying glass or a small, foam rubber football. Be on the lookout for jovial bank tellers.
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The average bank teller loses about $250 every year.
"If you worried about falling off the bike, you'd never get on. "

-- Lance Armstrong, bicycle racer

PO
Pareto Optimal
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