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ALTERNATIVE UNEMPLOYMENT RATES: The official unemployment rate estimated and reported monthly by the Bureau of Labor Statistics (BLS) using data from Current Population Survey is one of six alternative measures of unemployment tracked by the BLS, officially labeled U1-U6. The "official" unemployment rate is U3. The other five measures seek to document different ways in which labor can be underutilized, including unemployment duration, job losers, discouraged workers, marginally-attached workers, and part-time workers.

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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 going from convenience store to convenience store seeking to buy either a package of blank rewritable CDs or yellow cotton balls. Be on the lookout for small children selling products door-to-door.
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Three-forths of the gold mined each year is used to manufacture jewelry.
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