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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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DEMAND SHOCK

A disruption of market equilibrium caused by a change in a demand determinant and a shift of the demand curve. A demand shock can take one of two forms--a demand increase or a demand decrease. This is one of two disruptions of the market. The other is a supply shock.

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Today, you are likely to spend a great deal of time flipping through the yellow pages hoping to buy either a solid oak entertainment center or a remote controlled ceiling fan. Be on the lookout for door-to-door salesmen.
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The portion of aggregate output U.S. citizens pay in taxes (30%) is less than the other six leading industrialized nations -- Britain, Canada, France, Germany, Italy, or Japan.
"The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy."

-- Martin Luther King, Jr.

DCF
Discounted Cash Flow
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