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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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LONG-RUN AGGREGATE SUPPLY CURVE A graphical representation of the long-run relation between real production and the price level, holding all ceteris paribus aggregate supply determinants constant. The long-run aggregate supply curve, abbreviated LRAS, is one of two curves that graphically capture the supply-side of the aggregate market. The other is the short-run aggregate supply curve. The demand-side of the aggregate market is occupied by the aggregate demand curve. The vertical long-run aggregate supply curve captures the independent relation between real production and the price level that exists in the long run.
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RED AGGRESSERINE
[What's This?]
Today, you are likely to spend a great deal of time browsing about a thrift store trying to buy either a T-shirt commemorating the first day of spring or a coffee cup commemorating last Friday (you know why). Be on the lookout for jovial bank tellers.
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This isn't me! What am I?
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
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"Never confuse a single defeat with a final defeat." -- F. Scott Fitzgerald, writer
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ECU
European Currency Unit
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