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SPATIAL DIFFERENTIATION: The notion that economic activity is not evenly dispersed across the land. That is, goods, services, resources, production, and consumption are more concentrated at some locations and less concentrated at other locations due to natural endowments and human activity. The result is that no two location points have exactly the same access to inputs or outputs. This is a fundamental principle underlying the study of urban and regional economics and implies that firms and households must include transportation cost and location in production and consumption decisions.

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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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BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time flipping through the yellow pages wanting to buy either a pair of blue silicon oven mitts or a coffee cup commemorating the 2000 Olympics. Be on the lookout for door-to-door salesmen.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
"Managing intellectual assets has become the single most important task of business. "

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