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INCREASING RETURNS TO SCALE: A given proportionate increase in all resources in the long run results in a proportionately greater increase in production. Increasing returns to scale exists if a firm increases ALL resources -- labor, capital, and other inputs -- by 10%, and output increases by more than 10%. You might want to compare decreasing returns to scale and constant returns to scale.

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CONCENTRATION RATIOS

A family of measures of the proportion of total output in an industry that is produced by a given number of the largest firms in the industry. The two most common concentration ratios are for the four largest firms and the eight largest firms. The four-firm concentration ratio is the proportion of total output produced by the four largest firms in the industry and the eight-firm concentration ratio is proportion of total output produced by the eight largest firms in the industry. Concentration ratios are commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control of the largest firms in the industry. A related measure is the Herfindahl index.

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Today, you are likely to spend a great deal of time watching the shopping channel looking to buy either a birthday gift for your mother or a weathervane with a horse on top. Be on the lookout for telephone calls from former employers.
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Ragnar Frisch and Jan Tinbergen were the 1st Nobel Prize winners in Economics in 1969.
"My father used to say to me, „Whenever you get into a jam, whenever you get into a crisis or an emergency . . .become the calmest person in the room and you'll be able to figure your way out of it. "

-- Rudolph Giuliani

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