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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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ORANGE REBELOON
[What's This?]
Today, you are likely to spend a great deal of time searching for a specialty store hoping to buy either yellow cotton balls or a set of steel-belted radial snow tires. Be on the lookout for the last item on a shelf.
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
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"Defeat is simply a signal to press onward. " -- Helen Keller, author, lecturer
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OMO
Open Market Operations
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