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TOTAL COST AND MARGINAL COST: A mathematical connection between marginal cost and total cost stating that marginal cost IS the slope of the total cost curve. If the total cost curve has a positive slope (that is, is upward sloping), then marginal cost is positive. Moreover, if the total cost curve has a positive and increasingly steeper slope, then the marginal cost is positive and rising. If the total cost curve has a positive and decreasingly steeper slope, then the marginal cost is positive but falling.

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MONOPOLISTIC COMPETITION, ADVERTISING

Advertising is commonly used by firms operating under monopolistic competition as a way to create product differentiation and thus to acquire some degree of market control and thus charge a higher price.

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Today, you are likely to spend a great deal of time watching the shopping channel seeking to buy either a computer that can play music and burn CDs or a T-shirt commemorating last Friday (you know why). Be on the lookout for rusty deck screws.
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In the early 1900s around 300 automobile companies operated in the United States.
"The victory of success is half won when one gains the habit of setting goals and achieving them. Even the most tedious chore will become endurable as you parade through each day convinced that every task, no matter how menial or boring, brings you closer to fulfilling your dreams."

-- Og Mandino, Author and Speaker

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