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MATERIALS BALANCE: A hard and fast rule that the total amount of stuff removed from the natural environment will be eventually returned, probably as pollution. This is based on a fundamental law of physics that says material can be neither created nor destroyed, but only transformed. During any given period (such as a year) the quantity of materials returned to the environment is the difference between the quantity extracted and the quantity used by the economy.
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FOUR-FIRM CONCENTRATION RATIO The proportion of total output in an industry produced by the four 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 four-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 four largest firms in the industry.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
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"The mediocre teacher tells. The good teacher explains. The superior teacher demonstrates. The great teacher inspires." -- William Ward ‚ Texas Wesleyan University Administrator
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HIP
Health Insurance Plan
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