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BID-RENT CURVE: A line or curve that shows the relation between the rent economic activities are willing to pay for land (bid-rent) and the distance of the land from the point of attraction (such as the cent of a city). The bid-rent curve has a negative slope because the activities balance the bid-rent with the cost of transportation to the point of attraction. Farther distances require greater transportation cost and thus reduce the amount of rent that can be paid. The bid-rent curve indicates why rents, and by inference land values, tend to be higher near central locations.

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TRADE BARRIERS: Restrictions, invariably by government, that prevent free trade among countries. The more popular trade restrictions are tariffs, import quotas, and assorted nontariff barriers. An occasional embargo will be even thrown into this mix. The primary use of trade barriers is to restrict imports from entering in country. By restring imports, domestic producers of the restricted goods are protected from competition and are even subsidized through higher prices. Consumers, though, get the short end of this stick with higher prices and a limited choice of goods. In that producers tend to have more political clout than consumers, it's pretty obvious why trade barriers are a "natural" state of affairs.

     See also | foreign trade | free trade | tariff | import | quota | embargo | export | competition | subsidy | GATT |


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TRADE BARRIERS, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: October 7, 2026].


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MARGINAL PRODUCT

The change in the quantity of total product resulting from a unit change in a variable input, keeping all other inputs unchanged. Marginal product, usually abbreviated MP, is found by dividing the change in total product by the change in the variable input. Marginal product, which occasionally goes by the alias marginal physical product (MPP), is one of two measures derived from total product. The other is average product.

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The first paper notes printed in the United States were in denominations of 1 cent, 5 cents, 25 cents, and 50 cents.
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