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EIGHT-FIRM CONCENTRATION RATIO: The proportion of total output in an industry that's produced by the eight largest firms in the industry. This is one of two common concentration ratios. The other is the four-firm concentration ratio. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and how market control is held by the eight largest firms in the industry.

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SHUTDOWN RULE

A rule stating that a firm minimizes economic loss by producing no output in the short run if price is less than average variable cost. This is one of three short-run production alternatives facing a firm. The other two are profit maximization (if price exceeds average total cost) and loss minimization (if price is less than average total cost but greater than average variable cost).

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Today, you are likely to spend a great deal of time at a dollar discount store hoping to buy either a tall storage cabinet with five shelves and a secure lock or a birthday greeting card for your grandmother. Be on the lookout for slow moving vehicles with darkened windows.
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A scripophilist is one who collects rare stock and bond certificates, usually from extinct companies.
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MFC
Marginal Factor Cost
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