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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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PERFECT COMPETITION, PROFIT ANALYSIS

A perfectly competitive firm produces the profit-maximizing quantity of output that generates the highest level of profit. This profit approach is one of three methods that used to determine the profit-maximizing quantity of output. The other two methods involve a comparison of total revenue and total cost or a comparison of marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time at the confiscated property police auction seeking to buy either a solid oak entertainment center or a remote controlled ceiling fan. Be on the lookout for jovial bank tellers.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
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