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URBANIZATION ECONOMIES: A reduction in production cost the results when diverse activities are located in a concentrated urban area. Urbanization economies applied to all types of activities that benefit from assorted urban "amenities" such as public utilities, government services, information services that are inclined to experience decreasing average cost with large scale production. If, for example, a city has sufficient demand for a more efficiency, larger scale electrical generation plant, then everyone can benefit from lower electricity rates.

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BARRIERS TO ENTRY

Institutional, government, technological, or economic restrictions on the entry of participants into a market or industry. The four primary barriers to entry are: (1) resource ownership, (2) patents and copyrights, (3) government restrictions, and (2) start-up cost. Barriers to entry are a key reason for market control and the inefficiency that results. 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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Today, you are likely to spend a great deal of time at an auction hoping to buy either an extra large beach blanket or a large flower pot shaped like a Greek urn. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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During the American Revolution, the price of corn rose 10,000 percent, the price of wheat 14,000 percent, the price of flour 15,000 percent, and the price of beef 33,000 percent.
"You miss 100% of the shots you never take. "

-- Wayne Gretzky, hockey player

WACM
Weak Axiom of Cost Minimization
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