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OLIGOPOLY CHARACTERISTICS: The three most important characteristics of oligopoly are: (1) an industry dominated by a small number of large firms, (2) firms sell either identical or differentiated products, and (3) the industry has significant barriers to entry.

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INTEREST-RATE EFFECT

A change in aggregate expenditures on real production, especially those made by the household and business sectors, that results because a change in the price level alters the interest rate which then affects the cost of borrowing. This is one of three effects underlying the negative slope of the aggregate demand curve associated with a movement along the aggregate demand curve and a change in aggregate expenditures. The other two are real-balance effect and net-export effect.

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APLS

BLUE PLACIDOLA
[What's This?]

Today, you are likely to spend a great deal of time flipping through the yellow pages looking to buy either a genuine down-filled comforter or a 200-foot blue garden hose. Be on the lookout for fairy dust that tastes like salt.
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This isn't me! What am I?

A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"I have no expectation of making a hit every time I come to bat. What I seek is the highest possible batting average."

-- President Franklin Delano Roosevelt

GARCH
Generalized Autoregressive Conditional Heteroskedasticity
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