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PERSONAL INCOME AND NATIONAL INCOME: Personal income (PI) is the total income received by the members of the domestic household sector, which may or may not be earned from productive activities during a given period of time. National income (NI) is the total income earned by the citizens of the national economy resulting from their ownership of resources used in the production, which may or may not be received by members of the household sector. Personal income can be derived from national income by subtracting income earned but not received (IEBNR) and adding income received but not earned (IRBNE).

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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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Today, you are likely to spend a great deal of time watching infomercials looking to buy either a wall poster commemorating the moon landing or storage boxes for your winter clothes. Be on the lookout for jovial bank tellers.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
"Confidence . . . thrives on honesty, on honor, on the sacredness of obligations, on faithful protection and on unselfish performance. Without them it cannot live."

-- President Franklin Delano Roosevelt

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