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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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INTERNATIONAL TRADE

The exchange of goods and services among the nations of the world. Also termed foreign trade when viewed from the perspective of a given country, the international exchange of production is comparable to any exchange, except that buyers and sellers are from different countries. The study of international trade highlights an important economic principle, the law of comparative advantage, which helps to explain not only why nations engage in trade but why individuals engage in trade. A related area of study is international finance, both of which are part of the broader study of international economics.

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APLS

BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time touring the new suburban shopping complex hoping to buy either a coffee table shaped like the state of Florida or storage boxes for your summer clothes. Be on the lookout for deranged pelicans.
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A scripophilist is one who collects rare stock and bond certificates, usually from extinct companies.
"Education is the ability to listen to almost anything without losing your temper or your self-confidence. "

-- Robert Frost

DBD
Declining Balance Depreciation
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