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MARKET TRANSACTION: The exchange of goods and services through a market. The set of market transactions taking place in the economy is most important in terms of measuring gross domestic product (GDP). Market transactions provide the basic data used by number crunchers at the Bureau of Economic Analysis to begin the estimation of GDP. However, these number crunchers don't just want to measure market transactions, their goal is to measure economic production. As such, they eliminate some market transactions that do not involve economic production, then add economic production that do not involve market transactions.

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CONCENTRATION RATIOS

A family of measures of the proportion of total output in an industry that is produced by a given number of the largest firms in the industry. The two most common concentration ratios are for the four largest firms and the eight largest firms. The four-firm concentration ratio is the proportion of total output produced by the four largest firms in the industry and the eight-firm concentration ratio is proportion of total output produced by the eight largest firms in the industry. Concentration ratios are commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control of the largest firms in the industry. A related measure is the Herfindahl index.

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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway seeking to buy either a flower arrangement in a coffee cup for your father or a how-to book on meeting people. Be on the lookout for high interest rates.
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Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.
"The only profit center is the customer. "

-- Peter Drucker, management consultant

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