题目内容
Most developing countries have pollution-control laws and enforcement policies that are more stringent than those of the major industrial countries.
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When transportation costs are added to our trade model, the low-cost exporting country produces less, consumes more, and exports less than that which occurs in the absence of transportation costs.
When transportation costs are added to our trade model, the degree of specialization in production between two countries increases as do the gains from trade.
In the absence of transportation costs, free trade results in the equalization of traded goods, as well as resource prices, in the trading nations.
In industries where the final product is much less weighty or bulky than the materials from which it is made, firms tend to locate production near resource supplies.
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