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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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MARGINAL REVENUE, MONOPOLISTIC COMPETITION

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a monopolistically competitive firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a monopolistically competitive firm equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time surfing the Internet hoping to buy either a flower arrangement for that special day for your mother or a New York Yankees baseball cap. Be on the lookout for telephone calls from former employers.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
"The greatest glory in living lies not in never falling, but in rising every time we fall. "

-- Nelson Mandela, statesman

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