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HERFINDAHL-HIRSHMAN 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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TOTAL REVENUE, MONOPOLY The revenue received by a monopoly firm for the sale of its output. Total revenue is one two bits of information a monopoly firm needs to calculate economic profit, the other is total cost. In general, total revenue is price times quantity--the price received for selling a good times the quantity of the good sold at that price. For a monopoly firm, that charges different prices for different quantities, total revenue increases then decreases. Two other revenue measures directly related to total revenue are average revenue and marginal revenue. Total revenue is often depicted as a total revenue curve.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time searching the newspaper want ads hoping to buy either a flower arrangement in a coffee cup for your father or a how-to book on meeting people. Be on the lookout for celebrities who speak directly to you through your television.
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This isn't me! What am I?
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Lewis Carroll, the author of Alice in Wonderland, was the pseudonym of Charles Dodgson, an accomplished mathematician and economist.
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"always remember an epitaph which is in the cemetery at Tombstone, Arizona. It says: „Here lies Jack Williams. He done his damnedest.¾ I think that is the greatest epitaph a man can have ‚ When he gives everything that is in him to do the job he has before him. That is all you can ask of him and that is what I have tried to do. " -- Harry Truman, 33rd US president
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WLLN
Weak Law of Large Numbers
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