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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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MARGINAL REVENUE CURVE, PERFECT COMPETITION

A curve that graphically represents the relation between the marginal revenue received by a perfectly competitive firm for selling its output and the quantity of output sold. Because a perfectly competitive firm is a price taker and faces a horizontal demand curve, its marginal revenue curve is also horizontal and coincides with its average revenue (and demand) curve. A perfectly competitive firm maximizes profit by producing the quantity of output found at the intersection of the marginal revenue curve and marginal cost curve.

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APLS

PURPLE SMARPHIN
[What's This?]

Today, you are likely to spend a great deal of time flipping through the yellow pages trying to buy either a cell phone case or a pair of designer sunglasses. Be on the lookout for mail order catalogs with hidden messages.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"It is the mark of an educated mind to be able to entertain a thought without accepting it."

-- Aristotle

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Journal of Finance
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