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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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DEMAND SCHEDULE

A table that illustrates the alternative quantities of a commodity demanded at different prices. A demand schedule is a simple means of summarizing information about demand price and quantity demanded for a particular good. It is used to highlight the law of demand. It can also be used to derive a demand curve.

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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time lost in your local discount super center looking to buy either storage boxes for your family photos or a large, stuffed giraffe. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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Post WWI induced hyperinflation in German in the early 1900s raised prices by 726 million times from 1918 to 1923.
"Try first to be a man of value; success will follow. "

-- Albert Einstein, physicist

NBER
National Bureau of Economic Research
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