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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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PROGRESSIVE TAX

A tax in which the proportion of income paid in taxes is greater for higher income levels. A progressive income tax exists if taxpayers with more income pay a higher tax rate relative to income as income increases. A progressive tax is one of three alternations. The other two are proportional tax, in which the proportion of income paid in taxes is the same for all income levels, and regressive tax, in which the proportion of income paid in taxes is smaller for higher income levels.

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APLS

BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers trying to buy either a pair of red goulashes with shiny buckles or a handcrafted bird feeder. Be on the lookout for pencil sharpeners with an attitude.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
"Inside the ring or out, ain't nothing wrong with going down. It's staying down that's wrong. "

-- Muhammad Ali

AVC
Average Variable Cost
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