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AD: The abbreviation for aggregate demand, which is the total (or aggregate) real expenditures on final goods and services produced in the domestic economy that buyers would willing and able to make at different price levels, during a given time period (usually a year). Aggregate demand (AD) is one half of the aggregate market analysis; the other half is aggregate supply. Aggregate demand, relates the economy's price level, measured by the GDP price deflator, and aggregate expenditures on domestic production, measured by real gross domestic product. The aggregate expenditures are consumption, investment, government purchases, and net exports made by the four macroeconomic sectors (household, business, government, and foreign).
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PERFECT COMPETITION, DEMAND The demand curve for the output produced by a perfectly competitive firm is perfectly elastic at the going market price. The firm can sell all of the output that it wants at this price because it is a relatively small part of the market. As a price taker, the firm has no ability to charge a higher price and no reason to charge a lower one. The market price facing a perfectly competitive firm is also average revenue and, most important, marginal revenue.
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GRAY SKITTERY
[What's This?]
Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway wanting to buy either a T-shirt commemorating the first day of spring or a coffee cup commemorating last Friday (you know why). Be on the lookout for gnomes hiding in cypress trees.
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
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"Success is going from failure to failure without a loss of enthusiasm. " -- Winston Churchill, British statesman
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JEP
Journal of Economic Perspectives
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