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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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CONSUMER CONFIDENCE, AGGREGATE DEMAND DETERMINANT

One of several specific aggregate demand determinants assumed constant when the aggregate demand curve is constructed, and which shifts the aggregate demand curve when it changes. An increase in consumer confidence causes an increase (rightward shift) of the aggregate demand curve. A decrease in consumer confidence causes a decrease (leftward shift) of the aggregate demand curve. Other notable aggregate demand determinants include interest rates, federal deficit, inflationary expectations, and the money supply.

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Today, you are likely to spend a great deal of time looking for a downtown retail store looking to buy either a green and yellow striped sweater vest or a Boston Red Sox baseball cap. Be on the lookout for vindictive digital clocks with revenge on their minds.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
"It is not because things are difficult that we do not dare; it is because we do not dare that they are difficult. "

-- Seneca, statesman, dramatist, philosopher

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