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VARIABLE INPUT: An input whose quantity can be changed in the time period under consideration. This should be immediately compared and contrasted with fixed input. The most common example of a variable input is labor. A variable input provides the extra inputs that a firm needs to expand short-run production. In contrast, 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. This is, by the way, the law of diminishing marginal returns.
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HERFINDAHL INDEX A measure of concentration of the production in an industry calculated as the sum of the squares of market shares for each firm. This is one method of summarizing the degree to which an industry is oligopolistic and the concentration of market control held by the largest firms in the industry. Two other measures of industry concentration are the four-firm concentration ratio and the eight-firm concentration ratio.
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GREEN LOGIGUIN
[What's This?]
Today, you are likely to spend a great deal of time wandering around the shopping mall trying to buy either a birthday greeting card for your aunt or a wall poster commemorating the moon landing. Be on the lookout for strangers with large satchels of used undergarments.
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Sixty percent of big-firm executives said the cover letter is as important or more important than the resume itself when you're looking for a new job
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"God gives talent; work transforms talent into genius. " -- Anna Pavlova, ballerina
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PBOT
Phildelphia Board of Trade
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