March 19, 2018 

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DEMOGRAPHIC VARIABLES: Characteristics of the aggregate population that marketers use to segment the market, including age, ethnicity, income, education, gender, and race. Other characteristics include occupation, family size, religion, and social class. These characteristics are the link to buyers' wants and needs and affect purchasing behavior. By carefully studying population groups marketers develop marketing mixes that maximize customer activity.

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LONG-RUN INDUSTRY SUPPLY CURVE: The relation between market price and the quantity supplied by all firms in a perfectly competitive industry after the industry as completed its long-run adjustment. The long-run industry supply curve effectively traces out a series of equilibrium prices and quantities the reflect long-run adjustments of a perfectly competitive industry to demand shocks. This long-run adjustment can take one of three paths: increasing, decreasing, and constant. These three adjustment paths indicate an increasing-cost industry, decreasing-cost industry, and constant-cost industry, respectively.

     See also | price | quantity supplied | firm | perfect competition | industry | long-run adjustment, perfect competition | demand shock | increasing-cost industry | decreasing-cost industry | constant-cost industry |

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A perfectly competitive firm produces the profit-maximizing quantity of output that generates the highest level of profit. This profit approach is one of three methods that used to determine the profit-maximizing quantity of output. The other two methods involve a comparison of total revenue and total cost or a comparison of marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time watching infomercials hoping to buy either a travel case for you toothbrush or a looseleaf notebook binder. Be on the lookout for door-to-door salesmen.
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During the American Revolution, the price of corn rose 10,000 percent, the price of wheat 14,000 percent, the price of flour 15,000 percent, and the price of beef 33,000 percent.
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