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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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MERGER

The consolidation of two or more separately-owned businesses under single ownership. Mergers fall into one of three classes--(1) horizontal between firms that sell competing products in the same market, (2) vertical between firms in different stages of the production of one good, and (3) conglomerate between firms that are in separate industries. Because horizontal mergers tend to reduce competition, they are most likely to be scrutinized by government. Mergers are one of several behavioral inclinations of oligopoly. A related oligopolistic behavior is collusion.

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Today, you are likely to spend a great deal of time at a dollar discount store trying to buy either arch supports for your shoes or an AC adapter that works with your MPG player. Be on the lookout for slow moving vehicles with darkened windows.
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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.
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