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ENTRY BARRIERS: Institutional, government, technological, or economic restrictions 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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AGGREGATE SUPPLY DECREASE, LONG-RUN AGGREGATE MARKET A shock to the long-run aggregate market caused by a decrease in aggregate supply, resulting in and illustrated by a leftward shift of the long-run aggregate supply curve. A decrease in aggregate supply in the long-run aggregate market results in an increase in the price level and a decrease in real production. The level of real production resulting from the shock is a smaller level of full-employment real production.
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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time surfing the Internet wanting to buy either a replacement remote control for your television or a replacement nozzle for your shower. Be on the lookout for cardboard boxes.
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A half gallon milk jug holds about $50 in pennies.
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"My future starts when I wake up every morning . . . Every day I find something creative to do with my life. " -- Miles Davis, musician
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EJ
Economic Journal
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