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VERTICAL EQUITY: A system of taxes that treats unequal people unequally. In other words, if you make the less income than someone else and pay fewer personal income taxes, then we have vertical equity.

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HERFINDAHL INDEX

A measure of concentration of the production in an industry calculated as the sum of the squares of market shares for each firm. This is one method of summarizing the degree to which an industry is oligopolistic and the concentration of market control held by the largest firms in the industry. Two other measures of industry concentration are the four-firm concentration ratio and the eight-firm concentration ratio.

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Today, you are likely to spend a great deal of time searching for a specialty store looking to buy either a hepa filter for your furnace or a wall poster commemorating next Thursday. Be on the lookout for mail order catalogs with hidden messages.
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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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