The potential for trade diversion is smaller when a custom union's external tariff is lower rather than higher.
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If a customs union included all of the countries in the world, there could exist only trade creation, not trade diversion.
A. 对
B. 错
The large the size and the greater the number of countries in a customs union, the greater will be the trade-diversion effect.
A. 对
B. 错
Over the long run, the formation of a customs union may yield welfare gains due to economies of scale, greater competition, and stimulus to investment.
A. 对
B. 错
By the mid-1990s, the European Union had essentially achieved the common market stage of economic integration.
A. 对
B. 错