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AD VALOREM TARIFF: A tax on imports that is specified as a percentage of the value of the good or service being taxed. This is one form of trade barrier that's intended to restrict imports into a country. Unlike nontariff barriers and quotas, which increase prices and thus revenue received by domestic producers, an 'ad valorem tariff' generates revenue for the government. For example: a 15 percent ad valorem tariff on a TV set worth $100 would pay a tariff of $15. One advantage of an ad valorem tariff is that it keeps up with changes in prices (mostly inflation).

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MARKET FOR LEMONS

A market adversely selects only lower quality products for exchange. The market for lemons is an illustration of adverse selection that results from asymmetric information. In this market, because buyers have limited information they offer an average price based on the average quality of the goods. Sellers, however, with better information select to sell lower quality products but not higher quality ones. Two methods of address this problem are signalling and screening. Two related information problems are moral hazard and the principal-agent problem.

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Today, you are likely to spend a great deal of time at a flea market trying to buy either galvanized steel storage shelves or a large green chalkboard shaped like the state of Maine. Be on the lookout for deranged pelicans.
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Francis Bacon (1561-1626), a champion of the scientific method, died when he caught a severe cold while attempting to preserve a chicken by filling it with snow.
"Concentrate all your thoughts upon the work at hand. The sun's rays do not burn until brought to a focus."

-- Alexander Graham Bell, inventor

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