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PERSONAL CONSUMPTION EXPENDITURES: The official item in the National Income and Product Accounts maintained by the Bureau of Economic Analysis measuring household consumption expenditures on gross domestic product. Personal consumption expenditures are far and away the largest and tends to be the most stable of the four expenditures, averaging about 65-70% 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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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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[What's This?]

Today, you are likely to spend a great deal of time searching the newspaper want ads seeking to buy either clothing for your kitty cats or a set of luggage without wheels. Be on the lookout for strangers with large satchels of used undergarments.
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This isn't me! What am I?

Lewis Carroll, the author of Alice in Wonderland, was the pseudonym of Charles Dodgson, an accomplished mathematician and economist.
"You can't build a reputation on what you are going to do."

-- Henry Ford, automaker

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