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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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LONG-RUN AGGREGATE MARKET A macroeconomic model relating the price level and real production under the assumption that ALL prices are flexible. This is one of two aggregate market submodels used to analyze business cycles, gross production, unemployment, inflation, stabilization policies, and related macroeconomic phenomena. The other is the short-run aggregate market. The long-run aggregate market isolates the interaction between aggregate demand and long-run aggregate supply. The key assumption of this model is that ALL prices, especially resource prices, are flexible. The primary result of this model is that the economy achieves long-run equilibrium at full-employment real production.
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PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time at a flea market trying to buy either a how-to book on the art of negotiation or a flower arrangement for your aunt. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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In the early 1900s around 300 automobile companies operated in the United States.
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"Never let the fear of striking out get in your way. " -- Babe Ruth, baseball player
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S
Supply
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