Tariff
A tariff is a tax on imports or exports between sovereign states. It is a form of regulation of foreign trade. It is a policy that taxes foreign products to encourage or protect domestic industry. It helps limit trade deficits. The tariff is historically used to protect infant industries and to allow import substitution industrialization.
Tariff in United States history
During the Revolution, the British blockade from 1775 to 1783 largely ended foreign trade. In the 1783–89 Confederation Period, each state set up its own trade rules, often imposing tariffs or restrictions on neighboring states. The new Constitution, which went into effect in 1789, banned interstate tariffs or trade restrictions, as well as state taxes on exports.