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HERFINDAHL INDEX: A measure of concentration of the production in an industry that's calculated as the sum of the squares of market shares for each firm. This is an alternative method of summarizing the degree to which an industry is oligopolistic and the relative concentration of market power held by the largest firms in the industry. The Herfindahl index gives a better indication of the relative market control of the largest firms than can be found with the four-firm and eight-firm concentration ratios.
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VARIABLE INPUT An input whose quantity can be changed in the time period under consideration. The most common example of a variable input is labor. Variable inputs provide the means used by a firm to control short-run production. The alternative to variable input is fixed input. A fixed input, like capital, provides the capacity constraint in production. As larger quantities of a variable input, like labor, are added to a fixed input like capital, the variable input becomes less productive, which is the law of diminishing marginal returns.
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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time looking for a downtown retail store seeking to buy either a T-shirt commemorating yesterday or a pair of handcrafted oven mitts. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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On a typical day, the United States Mint produces over $1 million worth of dimes.
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"Don't judge each day by the harvest you reap but by the seeds that you plant. " -- Robert Louis Stephenson, writer
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AEC
Annual Equivalent Costs
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