题目内容
With constant opportunity costs, a nation will achieve the greatest possible gains from trade if it partially specializes in the production of the commodity of its comparative disadvantage.
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By reducing the overall volume of trade, import restrictions tend to reduce a nation's gains from trade.
According to the principle of comparative advantage, an open trading system results in resources being channeled from uses of low productivity to those of high productivity.
With increasing opportunity costs, comparative advantage depends on a nation's supply conditions and demand conditions; with constant opportunity costs, comparative advantage depends only on demand conditions.
The existence of exit barriers tends to delay the closing of inefficient firms that face international competitive disadvantages.
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