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SEVEN RULES: Seven key economic principles underlying the study of economics and the operation of the economy. These seven rules are: first -- scarcity, second -- subjectivity, third -- inequality, fourth -- competition, fifth -- imperfection, sixth -- ignorance, and seventh -- complexity.

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MARGINAL REVENUE, MONOPOLY

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a monopoly receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a monopoly equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time at a going out of business sale hoping to buy either a handcrafted bird feeder or a New York Yankees baseball cap. Be on the lookout for the happiest person in the room.
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The 22.6% decline in stock prices on October 19, 1987 was larger than the infamous 12.8% decline on October 29, 1929.
"Lord, where we are wrong, make us willing to change; where we are right, make us easy to live with. "

-- Peter Marshall, US Senate chaplain

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