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HHI: The common abbreviation for the Herfindahl-Hirshman index (or the Herfindahl index), which is 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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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius hoping to buy either a half-dozen helium filled balloons or a packet of address labels large enough for addresses of both the sender and the recipient. Be on the lookout for attractive cable television service repair people.
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Junk bonds are so called because they have a better than 50% chance of default, carrying a Standard & Poor's rating of CC or lower.
"It is not the mountain we conquer, but ourselves. "

-- Sir Edmund Hillary, Explorer

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