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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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PRICE ELASTICITY OF SUPPLY

The relative response of a change in quantity supplied to a change in price. More specifically the price elasticity of supply is the percentage change in quantity supplied due to a percentage change in price. This notion of elasticity captures the supply side of the market. A comparable elasticity on the demand side is the price elasticity of demand. Other notable supply elasticities are income elasticity of demand and cross elasticity of demand.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time searching for a specialty store hoping to buy either a coffee table shaped like the state of Florida or storage boxes for your summer clothes. Be on the lookout for fairy dust that tastes like salt.
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
"Learn to enjoy every minute of your life. Be happy now. Don't wait for something outside of yourself to make you happy in the future. Think how really precious is the time you have to spend, whether it's at work or with your family. Every minuteshould be enjoyed and savored."

-- Earl Nightingale

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currency and coins held by the nonbank public plus checkable deposits issued by traditional banks, savings and loan associations, credit unions, and mutual savings banks
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