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TAX PROPORTIONALITY: The proportion of income paid in taxes at different levels of income. In some taxes the proportion of income paid in taxes increases with income in other cases it decreases. And in still other cases, it remains the same. The three basic types of taxes are proportional taxes, progressive taxes, and regressive taxes. Because almost everyone would like to pay fewer taxes (and presumably have others pay more), tax proportionality is a the center of political controversy. Higher incomes prefer regressive taxes and lower incomes prefer regressive taxes.

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OLIGOPOLY, CONCENTRATION

Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.

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Today, you are likely to spend a great deal of time wandering around the downtown area looking to buy either a remote controlled sports car with an air spoiler or semi-gloss photo paper that works with your neighbor's printer. Be on the lookout for celebrities who speak directly to you through your television.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"The true idealist pursues what his heart says is right in a way that his head says will work. "

-- Richard Nixon, 37th US president

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