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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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TOTAL REVENUE CURVE, MONOPOLISTIC COMPETITION

A curve that graphically represents the relation between the total revenue received by a monopolistically competitive firm for selling its output and the quantity of output sold. It is combined with the total cost curve to determine economic profit and the profit maximizing level of production. The slope of the total revenue curve is marginal revenue.

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ORANGE REBELOON
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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors trying to buy either a weathervane with a cow on top or a box of multi-colored, plastic paper clips. Be on the lookout for attractive cable television service repair people.
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Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.
"Do what you feel in your heart to be right ‚ for you'll be criticized anyway. You'll be damned if you do and damned if you don't. "

-- Eleanor Roosevelt, first lady

APEC
Asia-Pacific Economic Co-operation
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