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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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GREEN LOGIGUIN
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Today, you are likely to spend a great deal of time strolling through a department store trying to buy either an AC adapter that works with your MPG player or rechargeable batteries. Be on the lookout for letters from the Internal Revenue Service.
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This isn't me! What am I?

The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
"Be kind and merciful. Let no one ever come to you without coming away better and happier."

-- Mother Teresa of Calcutta, humanitarian

BIS
Bank for International Settlements
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