题目内容
By reducing the overall volume of trade, import restrictions tend to reduce a nation's gains from trade.
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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.
The basic idea of mercantilism was that wealth consisted of the goods and services produced by a nation.
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