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OLIGOPOLY CHARACTERISTICS: The three most important characteristics of oligopoly are: (1) an industry dominated by a small number of large firms, (2) firms sell either identical or differentiated products, and (3) the industry has significant barriers to entry.

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CONSTANT-COST INDUSTRY

A perfectly competitive industry with a horizontal long-run industry supply curve that results because expansion of the industry causes no change in production cost or resource prices. A constant-cost industry occurs because the entry of new firms, prompted by an increase in demand, does not affect the long-run average cost curve of individual firms, which means the minimum efficient scale of production does not change.

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GREEN LOGIGUIN
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Today, you are likely to spend a great deal of time at a garage sale hoping to buy either an AC adapter for your CD player or storage boxes for your family photos. Be on the lookout for the last item on a shelf.
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John Maynard Keynes was born the same year Karl Marx died.
"Don't judge each day by the harvest you reap, but by the seeds you plant."

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