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ABSTRACTION METHODS: Abstraction is the process of simplifying the complexities of the real world by ignoring (hopefully) unimportant details, especially (for our purposes) while doing economic analysis. Three common methods of actual, real world abstraction used in economic theories are words, graphs, and equations. Words can be misunderstood. Graphs are a little more precise. And equations tend to be the most precise of the three.
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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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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time touring the new suburban shopping complex looking to buy either a weathervane with a horse on top or a case of blank recordable DVDs. Be on the lookout for the last item on a shelf.
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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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"There is no twilight zone of honesty in business. A thing is right or it's wrong. It's black or it's white. " -- John F. Dodge, automaker
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BIS
Bank for International Settlements
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