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PERFECT COMPETITION, LONG-RUN PRODUCTION ANALYSIS: In the long run, a perfectly competitive firm adjusts plant size, or the quantity of capital, to maximize long-run profit. In addition, the entry and exit of firms into and out of a perfectly competitive market guarantees that each perfectly competitive firm earns nothing more or less than a normal profit. As a perfectly competitive industry reacts to changes in demand, it traces out positive, negative, or horizontal long-run supply curve due to increasing, decreasing, or constant cost.

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CONSUMER DEMAND THEORY

The branch of economics devoted to the study of consumer behavior, especially as it applies to decisions related to purchasing goods and services through markets. Consumer demand theory is largely centered on the study and analysis of the utility generated from the satisfaction of wants and needs. The key principle of consumer demand theory is the law of diminishing marginal utility, which offers an explanation for the law of demand and the negative slope of the demand curve.

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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers trying to buy either a set of luggage without wheels or a how-to book on wine tasting. Be on the lookout for cardboard boxes.
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General Electric is the only stock from the original 1896 Dow Jones Industrial Average remaining in the current index.
"You can't build a reputation on what you are going to do."

-- Henry Ford, automaker

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