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OLIGOPOLY: A market structure dominated by a small number of large firms, selling either identical or differentiated products, and significant barriers to entry into the industry. This is one of four basic market structures. The other three are perfect competition, monopoly, and monopolistic competition.

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AVERAGE PRODUCT AND MARGINAL PRODUCT

A mathematical connection between average product and marginal product stating that the change in the average product depends on a comparison between the average product and marginal product. If marginal product is less than average product, then average product declines. If marginal product is greater than average product, then average product rises. If marginal product is equal to average product, then average product does not change.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time at a garage sale trying to buy either a rechargeable battery for your camera or a coffee cup commemorating the first day of spring. Be on the lookout for vindictive digital clocks with revenge on their minds.
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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.
"A leader, once convinced that a particular course of action is the right one, must . . . be undaunted when the going gets tough."

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