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THIRD-DEGREE PRICE DISCRIMINATION: A form of price discrimination in which a seller charges different prices to groups that are differentiated by an easily identifiable characteristic, such as location, age, sex, or ethnic group. This is the most common type of price discrimination. This is one of three price discrimination degrees. The others are first-degree price discrimination and second-degree price discrimination.

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HERFINDAHL INDEX

A measure of concentration of the production in an industry calculated as the sum of the squares of market shares for each firm. This is one method of summarizing the degree to which an industry is oligopolistic and the concentration of market control held by the largest firms in the industry. Two other measures of industry concentration are the four-firm concentration ratio and the eight-firm concentration ratio.

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Today, you are likely to spend a great deal of time watching the shopping channel hoping to buy either a replacement remote control for your television or a replacement nozzle for your shower. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
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