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HERFINDAHL INDEX: 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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UNEMPLOYMENT RATE, MEASUREMENT PROBLEMS

The official unemployment rate, which measures the proportion of the civilian labor force 16 years or older that is not engaged in productive activities but is actively seeking employment, might be either overstated or understated due to discouraged workers, part-time workers, and unreported legal or illegal employment. Taken together, these measurement problems suggest that the official unemployment rate is likely understated during business-cycle contraction and overstated during business-cycle expansions.

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Today, you are likely to spend a great deal of time strolling through a department store trying to buy either a travel case for you toothbrush or a looseleaf notebook binder. Be on the lookout for telephone calls from long-lost relatives.
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Paper money used by the Commonwealth of Massachusetts prior to the U.S. Revolutionary War, which was issued against the dictates of Britain, was designed by patriot and silversmith, Paul Revere.
"Inside the ring or out, ain't nothing wrong with going down. It's staying down that's wrong. "

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