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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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CHANGE IN DEMAND

A shift of the demand curve caused by a change in one of the demand determinants. A change in demand is caused by any factor affecting demand EXCEPT price. A related, but distinct, concept is a change in quantity demanded.

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APLS

RED AGGRESSERINE
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Today, you are likely to spend a great deal of time strolling through a department store wanting to buy either a set of hubcaps or handcrafted decorations to hang on your walls. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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The average bank teller loses about $250 every year.
"The true idealist pursues what his heart says is right in a way that his head says will work. "

-- Richard Nixon, 37th US president

NTB
Non-Tariff Barrier
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