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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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SCIENCE

A discipline, or topic of study, that uses the scientific method to investigate and explain the operation of the world by testing and verifying hypothesized relations. Science is commonly divided into physical sciences (including chemistry, physics, and biology) and social sciences (including economics, sociology, and political science). Science is not just a subject, but a method of investigation using the scientific method.

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APLS

BLACK DISMALAPOD
[What's This?]

Today, you are likely to spend a great deal of time strolling through a department store trying to buy either a set of steel-belted radial snow tires or a wall poster commemorating the 2000 Presidential election. Be on the lookout for slow moving vehicles with darkened windows.
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Lombard Street is London's equivalent of New York's Wall Street.
"No task is a long one but the task on which one dare not start: It becomes a nightmare. "

-- Charles Baudelaire, poet-critic

CCAPM
Consumption-Based Capital Asset Pricing Model
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