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ENTRY BARRIER: An institutional, government, technological, or economic restriction on the entry of firms into a market or industry. The four primary barriers to entry are: resource ownership, patents and copyrights, government restrictions, and start-up costs. Barriers to entry are a key reason for market control and the inefficiency that this generates. In particular, monopoly, oligopoly, monopsony, and oligopsony often owe their market control to assorted barriers to entry. By way of contrast, perfect competition, monopolistic competition, and monopsonistic competition have few if any barriers to entry and thus little or no market control.

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UTILITY MAXIMIZATION

The process or goal of obtaining the highest level of utility from the consumption of goods or services. The goal of maximizing utility is a key assumption underlying consumer behavior studied in consumer demand theory. Consumers are assumed to make choices, especially concerning the purchase of goods, such that they obtain the highest possible level of satisfaction. Utility maximization can be achieved at the peak of the total utility curve.

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Today, you are likely to spend a great deal of time looking for a downtown retail store looking to buy either 500 feet of telephone cable or a package of 4 by 6 index cards, the ones with lines. Be on the lookout for a thesaurus filled with typos.
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Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.
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