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INJECTION LINE: A line used in the injection-leakage model representing the relation between non-consumption expenditures (that is, injections) and national income. The three injections are investment expenditures, government purchases, and exports. The foundation of the injection line is the investment line, which is then enhanced by adding government purchases and exports. The other part of the injection-leakage model is a line representing leakages. The intersection of the injection and leakage lines identifies equilibrium aggregate output, or Keynesian equilibrium.

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MARKET STRUCTURES

The manner in which markets or industries are organized, based largely on the number of participants in the market or industry and the extent of market control of each participant. Perfect competition represents the benchmark market structure that contains a large number of participants on both sides of the market, and no market control by any firm. Three market structure models with varying degrees of market control on the supply side of the market are: monopoly, monopolistic competition, and oligopoly. Three lesser known market structures with varying degrees of market control on the demand side of the market are: monopsony, oligopsony, and monopsonistic competition.

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Today, you are likely to spend a great deal of time searching the newspaper want ads looking to buy either storage boxes for your family photos or a large, stuffed giraffe. Be on the lookout for telephone calls from long-lost relatives.
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Woodrow Wilson's portrait adorned the $100,000 bill that was removed from circulation in 1929. Woodrow Wilson was removed from circulation in 1924.
"To understand a man, you must know his memories. The same is true of a nation."

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American Bankers Association, Associate in Business Administration
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