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PATENT: The guaranteed ownership and control of an invention, innovation, or production technique by government for a period of time (currently 17 years). A patent gives the owner the exclusive rights to sell, market, license, or otherwise generate revenue from an invention, innovation, or production technique. Patents are designed to encourage inventions and other developments that promote technological advances. However, they are also an entry barrier and lead to market control.

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FOUR-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the four largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The four-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the four largest firms in the industry.

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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors seeking to buy either an AC adapter that won't fry your computer or a case for your designer sunglasses. Be on the lookout for slow moving vehicles with darkened windows.
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
"The mediocre teacher tells. The good teacher explains. The superior teacher demonstrates. The great teacher inspires."

-- William Ward ‚ Texas Wesleyan University Administrator

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