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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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OLIGOPOLY, CHARACTERISTICS

The three most important characteristics of oligopoly are: (1) an industry dominated by a small number of large firms, (2) firms sell either identical or differentiated products, and (3) the industry has significant barriers to entry.

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It's a bright spring morning, the sort of day that makes poets and pedestrians pontificate profusely about our wondrous world. But, wait... IT'S TEST DAY! You're late for an exam! You hurriedly roam the school halls, opening door after endless door along an infinite hallway, in search of your exam. All you discover, though, is Maurice Finklestein who smirks knowingly while ridiculing your tardiness. Why do we do it? Why do we put ourselves through 12 to 20 years of oppression in the halls of academia, learning stuff of questionable value? Why? Why? WHY?
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Today, you are likely to spend a great deal of time at a garage sale wanting to buy either blue cotton balls or a genuine down-filled pillow. Be on the lookout for celebrities who speak directly to you through your television.
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
"Each of us is issued but one life, and we know full well how it all ends. It would be regrettable to squander this one chance on someone else's appearance, someone else's experience. "

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