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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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MARGINAL REVENUE PRODUCT CURVE A curve that graphically illustrates the relation between marginal revenue product and the quantity of the variable input, holding all other inputs fixed. This curve indicates the incremental change in total revenue for incremental changes in the variable input. The marginal revenue product curve plays a key role in marginal productivity theory and the economic analysis of factor markets.
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BLACK DISMALAPOD
[What's This?]
Today, you are likely to spend a great deal of time wandering around the downtown area hoping to buy either an instructional DVD on learning to the play the oboe or a small, foam rubber football. Be on the lookout for attractive cable television service repair people.
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This isn't me! What am I?
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The portrait on the quarter is a more accurate likeness of George Washington than that on the dollar bill.
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"If you don't know where you are going, any road will get you there." -- Lewis Carroll, writer
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GARP
Generalized Axioms of Revealed Preference
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