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
Trade deficits mean that consumers buy too much foreign goods and too few domestic products. According to Keynesian theory, trade deficits are harmful. Countries that import more than they export weaken their economies. As the trade deficit increases, unemployment or poverty increases and GDP slows down. And surplus countries getting richer at the expense of deficit countries. They destroy the production of their trading partners. John Maynard Keynes thought that surplus countries should be taxed to avoid trade imbalances. The tariff is used to equalize the trade balance in order to protect domestic workers. Peter Temin explain that "a tariff is an expansionary policy, like a devaluation as it diverts demand from foreign to home producers".