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ENTRY BARRIERS: Institutional, government, technological, or economic restrictions 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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BILATERAL MONOPOLY, FACTOR MARKET ANALYSIS

The analysis of a factor market characterized by monopsony dominating the buying side and monopoly dominating the selling side indicates that the factor price and quantity exchanged depends on the negotiating power of each side. Ironically, the factor price is likely to be closer to the efficient price achieved with perfect competition than that achieved individually by either monopsony or monopoly.

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WHITE GULLIBON
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Today, you are likely to spend a great deal of time lost in your local discount super center seeking to buy either a case of blank recordable DVDs or a pair of red goulashes with shiny buckles. Be on the lookout for the last item on a shelf.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
"Habit is a cable; we weave a thread of it each day, and at last we cannot break it. "

-- Horace Mann, educator

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