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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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SLOPE, SHORT-RUN AGGREGATE SUPPLY CURVE The positive slope of the short-run aggregate supply curve, reflecting the direct relation between the price level and real production, results for three primary reasons--inflexible resources, frictional and structural unemployment, and purchasing power imbalances.
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GRAY SKITTERY
[What's This?]
Today, you are likely to spend a great deal of time lost in your local discount super center seeking to buy either several magazines on computer software or a T-shirt commemorating the second moon landing. Be on the lookout for door-to-door salesmen.
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This isn't me! What am I?
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Ragnar Frisch and Jan Tinbergen were the 1st Nobel Prize winners in Economics in 1969.
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"If you wouldn't write it and sign it, don't say it." -- Earl Wilson, Columnist
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CBOE
Chicago Board Options Exchange
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