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MARKET SHARE: The fraction of an industry's total sales accounted for by a single business. In general, market share is a "first-guess" indicator of a firm's market control. If, for example, a company has a market share of 100 percent (that is, a monopoly), then you can rest assured it has a substantial amount of market control. A company with a 25 percent market share has less, but still notable, market control. In fact, when you get right down to the bottom line, the phrase "market share" is only worth mentioning for oligopolistic firms with a significant degree of market control. There really is no market control for a monopolistically competitive firm with a 0.00000001 percent market share.

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AVERAGE FIXED COST

Total fixed cost per unit of output, found by dividing total fixed cost by the quantity of output. When compared with price (per unit revenue), average fixed cost (AFC) indicates whether or not a profit-maximizing firm should shutdown production in the short run. Average fixed cost is one of three average cost concepts important to short-run production analysis. The other two are average total cost and average variable cost. A related concept is marginal cost.

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Today, you are likely to spend a great deal of time wandering around the shopping mall wanting to buy either 500 feet of coaxial cable or a coffee cup commemorating the 1960 Presidential election. Be on the lookout for spoiled cheese hiding under your bed hatching conspiracies against humanity.
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The standard "debt" notation I.O.U. does not mean "I owe you," but actually stands for "I owe unto..."
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