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COMPETITION AMONG THE FEW: A market with a small number of sellers (or buyers), such that each seller (or buyer) has some degree of market control. Many think of this type of competition when the term competition arises (the other type is competition among the many). This sort of competition leads to intense rivalry where each participant achieves their objective only by beating the others. I call this track-meet competition. In a track race among a handful of competitors, like a 100 meter sprint, the winner is the fastest of THIS GROUP.

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MARGINAL COST

The change in total cost (or total variable cost) resulting from a change in the quantity of output produced by a firm in the short run. Marginal cost (MC) indicates how much total cost changes for a given change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. It is found by dividing the change in total cost (or total variable cost) by the change in output. Marginal cost is one of four cost concepts used in short-run production analysis. The other three are average total cost, average fixed cost, and average variable cost.

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