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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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SLOPE, NET EXPORTS LINE The negative slope of the net exports line is based on the marginal propensity to import (MPM). Because net exports are exports minus imports, the induced change in imports causes an opposite change in net exports. As such, the slope of the net exports line is negative, less than zero (but greater than negative one). The slope of the net exports line affects the slope of the aggregate expenditures line and thus also affects the magnitude of the multiplier process.
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PURPLE SMARPHIN [What's This?]
Today, you are likely to spend a great deal of time searching for rummage sales hoping to buy either a rechargeable flashlight or storage boxes for your computer software CDs. Be on the lookout for infected paper cuts. Your Complete Scope
This isn't me! What am I?
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
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"I do the best I know how, the very best I can, and I mean to keep doing so until the end. " -- Abraham Lincoln, 16th US president
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NBER National Bureau of Economic Research
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