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AGGREGATION: The process of adding up, summing, or otherwise identifying the total value of a variable or measure, especially when used in the study of macroeconomics. Common items that are aggregated are demand, supply, and expenditures on gross domestic product, which result in aggregate demand, aggregate supply, and aggregate expenditures.

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BARRIERS TO ENTRY

Institutional, government, technological, or economic restrictions on the entry of participants into a market or industry. The four primary barriers to entry are: (1) resource ownership, (2) patents and copyrights, (3) government restrictions, and (2) start-up cost. Barriers to entry are a key reason for market control and the inefficiency that results. 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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APLS

ORANGE REBELOON
[What's This?]

Today, you are likely to spend a great deal of time searching for a specialty store hoping to buy either a how-to book on surfing the Internet or a computer that can play music and burn CDs. Be on the lookout for mail order catalogs with hidden messages.
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The wealthy industrialist, Andrew Carnegie, was once removed from a London tram because he lacked the money needed for the fare.
"He who has a „why¾ to live can bear with almost any „how.""

-- Friedrich Nietzsche, Philosopher

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Association of Accounting Technicians
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