Question

what do you means by trade barrier

Answer 1

Trade barriers are government-induced restrictions on international trade. Most trade barriers work on the same principle: the imposition of some sort of cost on trade that raises the price or availability of the traded products. 

Answer 2

A barrier to trade is a government imposed restraint on the flow of international goods or services. The most common barrier to trade is a tariff—a tax on imports. Tariffs raise the price of imported goods relative to domestic goods

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