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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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INVESTMENT EXPENDITURES

Expenditures made by the business sector on final goods and services, or gross domestic product, especially the purchase of productive capital goods. Investment expenditures play a central role in macroeconomic activity affecting both short-run business cycles and long-run economic growth. These expenditures reflect the general act of investment involving foregoing current satisfaction to produce capital goods and are officially measured by gross private domestic investment. These are one of four expenditures on gross domestic product. The other three are consumption expenditures, government purchases, and net exports.

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Today, you are likely to spend a great deal of time at a flea market trying to buy either galvanized steel storage shelves or a large green chalkboard shaped like the state of Maine. Be on the lookout for deranged pelicans.
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