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ZONING: Legal restrictions on where different activities can locate within a city. Most cities regulate the location of industrial, commercial, and residential activities. The underlying motivation behind zoning is to keep less desirable, but perhaps more profitable, activities from encroaching upon residential areas.

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FOUR-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the four 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 four-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 four largest firms in the industry.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time at a going out of business sale trying to buy either a computer that can play video games and burn DVDs or a black duffle bag with velcro closures. Be on the lookout for poorly written technical manuals.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
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