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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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PRODUCT LIFE CYCLE

The different stages that a product traverses over the course of its life from initial availability (birth) to eventual unavailability (death). The key stages are development, introduction, growth, maturity, saturation, and decline. The product life cycle, represented by an S-shaped curve, is an adaptation of the biological life cycle and is common to the study of marketing. It is also important in the analysis of innovation and economic instability. In addition to biological growth, comparable S-shaped life cycles are found in short-run production of a firm, the growth of a person's income, the acquisition of knowledge, and the development of a civilization.

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Today, you are likely to spend a great deal of time lost in your local discount super center trying to buy either a handcrafted bird feeder or a New York Yankees baseball cap. Be on the lookout for slightly overweight pizza delivery guys.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"It takes generosity to discover the whole through others. If you realize you are only a violin, you can open yourself up to the world by playing your role in the concert. "

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