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TOTAL COST AND MARGINAL COST: A mathematical connection between marginal cost and total cost stating that marginal cost IS the slope of the total cost curve. If the total cost curve has a positive slope (that is, is upward sloping), then marginal cost is positive. Moreover, if the total cost curve has a positive and increasingly steeper slope, then the marginal cost is positive and rising. If the total cost curve has a positive and decreasingly steeper slope, then the marginal cost is positive but falling.

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IMPERFECT COMPETITION

Markets or industries with two or more sellers and buyers that fail to match the criteria of perfect competition. The most noted examples of imperfect competition are the two market structures with selling-side control--monopolistic competition and oligopoly. Lesser known market structures with buying-side control--monopsonistic competition and oligopsony--are also considered as imperfect competition. Facing no competition, monopoly and monopsony are not included. Most real world markets can be considered imperfect competition.

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GRAY SKITTERY
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Today, you are likely to spend a great deal of time watching the shopping channel wanting to buy either pink cotton balls or a genuine down-filled comforter. Be on the lookout for fairy dust that tastes like salt.
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In the early 1900s around 300 automobile companies operated in the United States.
"Be a yardstick of quality. Some people aren't used to an environment where excellence is expected. "

-- Steve Jobs, Apple Computer co-founder

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