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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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MARKET SHARE The fraction of an industry's total sales or some other activity accounted for by one or more firms in the industry. An individual firm is often concerned with its "share of the market" as an indication of "success." Market share is also key to the analysis of market structure, market control, and industry concentration--especially for oligopoly. It can be used to indicated the degree concentration and market control of one or more firms in an industry. It can be used alone or to calculate concentration ratios and the Herfindahl index.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway hoping to buy either a combination CD player, clock radio, and telephone (with answering machine) or a revolving spice rack. Be on the lookout for strangers with large satchels of used undergarments.
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In the early 1900s around 300 automobile companies operated in the United States.
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"The secret of getting things done is to act! " -- Dante Alighieri, poet
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EJ
Economic Journal
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