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MARGINAL REVENUE, MONOPOLISTIC COMPETITION: The change in total revenue received by a monopolistically competitive firm resulting from a change in the quantity of output sold. For a monopolistically competitive firm, marginal revenue is less than the price.

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COEFFICIENT OF ELASTICITY

A numerical measure of the relative response of one variable to changes in another variable. The coefficient of elasticity is used to quantify the concept of elasticity, including price elasticity of demand, price elasticity of supply, income elasticity of demand, and cross elasticity of demand. The coefficient can be calculated using the simple endpoint or midpoint formulas or with more sophisticated calculus and logarithmic techniques.

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Today, you are likely to spend a great deal of time flipping through mail order catalogs looking to buy either a pair of red and purple designer socks or a T-shirt commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki. Be on the lookout for slightly overweight pizza delivery guys.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
"Time is the scarcest resource, and unless it is managed nothing else can be managed."

-- Peter F. Drucker

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