Trade Restrictions

Reasons for restrictions

1. The infant industry argument protects new firms until they can compete, as South Korea did in shielding its car and steel industries while building up manufacturing.
2. Anti-dumping action guards against foreign goods sold below cost, e.g. the EU and US anti-dumping duties on cheap Chinese steel.
3. Protection can defend jobs in threatened industries and safeguard strategic or security sectors such as food and defence.
4. Tariffs can also raise government revenue, which matters most for developing economies, or help correct a current account deficit.

Types of restriction

1. A quota limits volume but, unlike a tariff, raises no revenue for the government: the scarcity gain goes to whoever holds the import licences, as with the EU textile and clothing quotas under the former Multi Fibre Arrangement.
2. Subsidies to domestic producers are common in agriculture, e.g. the EU Common Agricultural Policy (CAP) and US farm subsidies.
3. Non-tariff barriers such as EU regulatory standards on food and chemicals, import licensing or embargoes like the long-standing US embargo on Cuba can block imports as effectively as a tax.

Impact of protection

1. On a tariff diagram the world price is a horizontal line, and the tariff shifts it upward, raising the domestic price.
2. Consumers lose, as they pay a higher price and buy less, cutting consumer surplus.
3. Domestic producers gain, as they supply more at the higher price.
4. The government gains tariff revenue equal to the tariff times the imports that remain, though a quota yields no such revenue.
5. Two welfare triangles are lost as a deadweight welfare loss, so there is a net efficiency loss for the economy.
6. Living standards can fall as prices rise, and sheltered producers may become less efficient over time.
7. Effects on equality are mixed, as protected workers gain but higher prices hit poorer consumers hardest.
8. Protection also risks retaliation and a trade war, as in the US-China tariff war from 2018 when US Section 301 tariffs met Chinese retaliation on soybeans, and the US Section 232 steel and aluminium tariffs that drew EU counter-tariffs.

Are tariffs ever justified?

1. They can be justified because a genuine infant industry, dumping by foreign rivals, or a strategic sector may warrant temporary, targeted protection, and tariffs raise revenue for governments with weak tax systems.
2. But tariffs create a deadweight welfare loss, raise prices for consumers, let protected firms grow inefficient, and invite retaliation that can shrink a country's own exports.
3. On balance it depends on whether the protection is temporary and targeted at a real market failure, how trading partners respond, and whether a subsidy or supply-side policy would correct the problem at lower cost.