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TFC: The abbreviation for total fixed cost, which is cost of production that does NOT change with changes in the quantity of output produced by a firm in the short run. Total fixed cost is one part of total cost. The other is total variable cost. At any and all levels of output, fixed cost is the same. It doesn't change. This includes cost that is not dependent on, or unrelated to, production. The best way to identify fixed cost is to produce zero output. Fixed cost is incurred whether or not any output is produced. A cost measure directly related to total fixed cost is average fixed cost.

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EIGHT-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the eight largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the eight largest firms in the industry.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius looking to buy either a rechargeable battery for your camera or a coffee cup commemorating the first day of spring. Be on the lookout for attractive cable television service repair people.
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The first paper notes printed in the United States were in denominations of 1 cent, 5 cents, 25 cents, and 50 cents.
"When the solution is simple, God is answering."

-- Albert Einstein

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