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DERIVATION, AGGREGATE EXPENDITURES LINE: An aggregate expenditures line, a graphical depiction of the relation between aggregate expenditures and the level of aggregate income or production, can be derived by sequentially adding expenditures by the four macroeconomic sectors (household, business, government, and foreign). This derivation process begins with the consumption line, then adds investment, government purchases, and finally net exports. The process actually generates three alternative aggregate expenditures lines based on the number of sectors included (two sector, three sector, and four sector).

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OLIGOPOLY, CONCENTRATION

Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.

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APLS

GREEN LOGIGUIN
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Today, you are likely to spend a great deal of time at a crowded estate auction hoping to buy either a green and yellow striped sweater vest or a Boston Red Sox baseball cap. Be on the lookout for door-to-door salesmen.
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This isn't me! What am I?

Sixty percent of big-firm executives said the cover letter is as important or more important than the resume itself when you're looking for a new job
"Trust yourself. You know more than you think you do. "

-- Benjamin Spock, doctor

IRT
International Trade Commission
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