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ENTRY BARRIERS: Institutional, government, technological, or economic restrictions 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 TAX AND NONTAX PAYMENTS

The official item in the National Income and Product Accounts maintained by the Bureau of Economics Analysis measuring the personal income taxes paid to the government sector on personal income received by the household sector. Personal tax and nontax payments are subtracted from personal income (PI) to calculate disposable income (DI). Personal tax and nontax payments are about 15 percent of personal income and about 13 percent of gross domestic product.

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ORANGE REBELOON
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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 computer that can play video games and burn DVDs or a black duffle bag with velcro closures. Be on the lookout for small children selling products door-to-door.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
"We succeed only as we identify in life, or in war, or in anything else, a single overriding objective, and make all other considerations bend to that one objective. "

-- President Dwight D. Eisenhower

MRP
Marginal Revenue Product
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