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NATIONAL ASSOCIATION OF SECURITIES DEALERS: A stock market in which corporate stocks are exchanged by dealers across the country using a computerized system of stock price quotes. This is often referred to as the "over-the-counter" stock market, because, unlike the New York Stock Exchange, the American Stock Exchange, and others, the dealers don't conduct their business at a single location. They match up their buy and sell orders through a computer network rather than through the face-to-face contact. Transactions conducted by the NASD give rise to one of the more commonly publicized stock market price indicators, the NASDAQ (which stands for National Association of Securities Dealers Automated Quotation). The widely used NASDAQ composite index is based on the prices of 5,000 of these over-the-counter stocks.

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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 going from convenience store to convenience store wanting to buy either a birthday greeting card for your father or a T-shirt commemorating the first day of spring. Be on the lookout for pencil sharpeners with an attitude.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"All things are difficult before they are easy."

-- Thomas Fuller, Physician

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