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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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PERSONAL CONSUMPTION EXPENDITURES

The official item in the National Income and Product Accounts maintained by the Bureau of Economics Analysis that measures household consumption expenditures on gross domestic product. Personal consumption expenditures are far and away the largest and most stable of the four expenditures, averaging about 65 to 70 percent of gross domestic product. The other official expenditures included in the National Income and Product Accounts are gross private domestic investment, government consumption expenditures and gross investment, and net exports of goods and services.

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BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time searching for a specialty store trying to buy either several orange mixing bowls or clothing for your pet dog. Be on the lookout for infected paper cuts.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
"You miss 100% of the shots you never take. "

-- Wayne Gretzky, hockey player

GARCH
Generalized Autoregressive Conditional Heteroskedasticity
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