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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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PERFECT COMPETITION, EFFICIENCY

Perfect competition is an idealized market structure that achieves an efficient allocation of resources. This efficiency is achieved because the profit-maximizing quantity of output produced by a perfectly competitive firm results in the equality between price and marginal cost. In the short run, this involves the equality between price and short-run marginal cost. In the long run, this is seen with the equality between price and long-run marginal cost at the minimum efficient scale of production.

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Today, you are likely to spend a great deal of time at the confiscated property police auction trying to buy either storage boxes for your family photos or a large, stuffed giraffe. Be on the lookout for strangers with large satchels of used undergarments.
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There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"I think luck is the sense to recognize an opportunity and the ability to take advantage of it . The man who can smile at his breaks and grabs his chance gets on."

-- Samuel Goldwyn, Film executive

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