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OPEN MARKET: A market, not unlike that stock market, that trades the U.S. Treasury securities that comprises the federal debt. U.S. Treasury securities are low risk and extremely secure financial instruments that are held by all sorts of investors, especially commercial banks. The Federal Reserve System is also a major holder of U.S. Treasury securities and participant in the open market. In fact, the Federal Reserve System used buying and selling of U.S. Treasury securities through the open market as a means of controlling the money, through what is appropriately termed open market operations.

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EIGHT-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the eight largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the eight largest firms in the industry.

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Today, you are likely to spend a great deal of time flipping through mail order catalogs wanting to buy either storage boxes for your summer clothes or 500 feet of coaxial cable. Be on the lookout for attractive cable television service repair people.
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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.
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