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LONG-RUN MARGINAL COST: The change in the long-run total cost of producing a good or service resulting from a change in the quantity of output produced. Like all marginals, long-run marginal cost is the increment in the corresponding total. What's most notable about long-run marginal cost, however, is that we are operating in the long run. Unlike the short run, in which at least one input is fixed, there are no fixed inputs in the long run. As such, there is only variable cost. This means that long-run marginal cost is the result of changes in the cost of all inputs.

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TOTAL REVENUE, MONOPOLISTIC COMPETITION

The revenue received by a monopolistically competitive firm for the sale of its output. Total revenue is one two bits of information a monopolistically competitive firm needs to calculate economic profit, the other is total cost. In general, total revenue is the price times quantity--the price received for selling a good times the quantity of the good sold at that price. For a monopolistically competitive firm, which has a modest degree of market control, total revenue increases at a decreasing rate. Two other revenue measures directly related to total cost are average revenue and marginal revenue. Total revenue is often depicted as a total revenue curve.

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ORANGE REBELOON
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Today, you are likely to spend a great deal of time going from convenience store to convenience store trying to buy either a flower arrangement with a lot of roses for your grandmother or a wall poster commemorating the first day of winter. Be on the lookout for jovial bank tellers.
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Potato chips were invented in 1853 by a irritated chef repeatedly seeking to appease the hard to please Cornelius Vanderbilt who demanded french fried potatoes that were thinner and crisper than normal.
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ARIMA
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