题目内容
The North American Free Trade Agreement was expected to provide proportionately smaller benefits to Mexico than to the United States or Canada.
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All welfare consequences of a regional trading arrangement are dynamic.
All welfare effects of a regional agreement agreement are static.
Under the variable levy system of the European Union, EU farms are protected against import competition by tariffs that vary inversely with the world price.
Within a customs union, broader markets may also promote greater competition among producers.
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