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BARRIER TO ENTRY: 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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MACROECONOMICS

The branch of economics that studies the entire economy, especially such topics as aggregate production, unemployment, inflation, and business cycles. It can be thought of as the study of the economic forest, as compared to microeconomics, which is study of the economic trees.

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BEIGE MUNDORTLE
[What's This?]

Today, you are likely to spend a great deal of time calling an endless list of 800 numbers hoping to buy either galvanized steel storage shelves or a large green chalkboard shaped like the state of Maine. Be on the lookout for strangers with large satchels of used undergarments.
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Lombard Street is London's equivalent of New York's Wall Street.
"Well done is better than well said. "

-- Benjamin Franklin, statesman, inventor

PHLX
Philiadelphia Stock Exchange
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