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PERFECT COMPETITION AND SHORT-RUN SUPPLY CURVE: A perfectly competitive firm's supply curve is that portion of its' marginal cost curve that lies above the minimum of the average variable cost curve. A perfectly competitive firm maximizes profit by producing the quantity of output that equates price and marginal cost. As such, the firm moves along it's marginal cost curve in response to alternative prices. Because the marginal cost curve is positively sloped due to the law of diminishing marginal returns, the firm's supply curve is also positively sloped.

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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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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time wandering around the shopping mall trying to buy either several magazines on time travel or 500 feet of telephone cable. Be on the lookout for defective microphones.
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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.
"No man, for any considerable time, can wear one face to himself and another to the multitude without finally getting bewildered as to which may be true."

-- Nathanial Hawthorne, Author

LCH
Life Cycle Hypothesis
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