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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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NATIONAL BANKS

Traditional banks that are chartered by the Comptroller of the Currency and are automatically members of the Federal Reserve System. The contrast to national banks are state banks, which are chartered by one of the fifty states. National banks tend to larger than state banks and whether justified or not tend to be slightly more prestigious. In the modern economy this distinction is less important than it was a few decades bank when state banks were subject to lesser state regulations than national banks.

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Today, you are likely to spend a great deal of time touring the new suburban shopping complex hoping to buy either a battery-powered, rechargeable vacuum cleaner or a remote controlled World War I bi-plane. Be on the lookout for telephone calls from former employers.
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Lewis Carroll, the author of Alice in Wonderland, was the pseudonym of Charles Dodgson, an accomplished mathematician and economist.
"There is no passion to be found playing small ‚ in settling for a life that idles than the one you are capable of living."

-- Nelson Mandela

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