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SERVICES, CONSUMPTION: Personal consumption expenditures on activities that provide direct satisfaction of wants and needs without the production of tangible goods. Common examples are information, entertainment, and education. This is one of three categories of personal consumption expenditures in the National Income and Product Accounts maintained by the Bureau of Economic Analysis. The other two are durable goods (see durable goods, consumption) and nondurable goods (see nondurable goods, consumption). Services are about 60% of personal consumption expenditures and 40% of gross domestic product.

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MARGINAL REVENUE, MONOPOLISTIC COMPETITION

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a monopolistically competitive firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a monopolistically competitive firm equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time strolling through a department store wanting to buy either a wall poster commemorating the first day of spring or a lazy Susan for you dining room table. Be on the lookout for malfunctioning pocket calculators.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
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