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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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PERSONAL CONSUMPTION EXPENDITURES

The official item in the National Income and Product Accounts maintained by the Bureau of Economics Analysis that measures household consumption expenditures on gross domestic product. Personal consumption expenditures are far and away the largest and most stable of the four expenditures, averaging about 65 to 70 percent of gross domestic product. The other official expenditures included in the National Income and Product Accounts are gross private domestic investment, government consumption expenditures and gross investment, and net exports of goods and services.

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Today, you are likely to spend a great deal of time browsing through a long list of dot com websites looking to buy either a rechargeable battery for your camera or a coffee cup commemorating the first day of spring. Be on the lookout for letters from the Internal Revenue Service.
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Two and a half gallons of oil are needed to produce one automobile tire.
"There is at least one point in the history of any company when you have to change dramatically to rise to the next level of performance. Miss that moment, and you start to decline. "

-- Andy Grove, Intel Corp. chairman

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