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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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INFLATION

A persistent increase in the average price level in the economy. It is measured by the inflation rate, the annual percentage change in a price index such as the Consumer Price Index (CPI) or GDP price deflator. Inflation is the most common phenomenon associated with the price level. Two related phenomena are deflation, a decrease in the price level, and disinflation, a decrease in the inflation rate. Inflation is one of two key macroeconomic problems. The other is unemployment.

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Today, you are likely to spend a great deal of time at a dollar discount store wanting to buy either a graduation present for your niece or nephew or a toaster oven that has convection cooking. Be on the lookout for poorly written technical manuals.
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There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"Everyone's got it in him, if he'll only make up his mind and stick at it. None of us is born with a stop-valve on his powers or with a set limit to his capacities. There's no limit possible to the expansion of each one of us."

-- Charles M. Schwab

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Accelerated Cost Recovery System
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