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BARRIER TO ENTRY: 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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CHANGE IN QUANTITY SUPPLIED A movement along a given supply curve caused by a change in supply price. The only factor that can cause a change in quantity supplied is price. A related, but distinct, concept is a change in supply.
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ORANGE REBELOON
[What's This?]
Today, you are likely to spend a great deal of time calling an endless list of 800 numbers looking to buy either a bottle of blackcherry flavored spring water or a travel case for you toothbrush. Be on the lookout for mail order catalogs with hidden messages.
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Three-forths of the gold mined each year is used to manufacture jewelry.
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"Do not stop thinking of life as an adventure. You have no security unless you can live bravely, excitingly, imaginatively, unless you can choose a challenge instead of a competence. " -- Eleanor Roosevelt, first lady
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LS
Least Squares
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