Types of trade protection

A tariff is a tax imposed by a government on imported goods, raising their price in the domestic market to protect local producers from foreign competition.

The gap between domestic supply and domestic demand at the world price shows the quantity of imports. After the tariff, this gap narrows as domestic production rises and consumption falls.

Consumers pay higher prices, have less choice, and consume a lower quantity. Their consumer surplus decreases. This is the main cost of tariff protection.

Domestic producers gain from higher prices and increased market share. They can sell more output at a higher price, increasing producer surplus and protecting domestic jobs.

It is the rectangle equal to the tariff per unit × the quantity of imports after the tariff. It represents the tax revenue collected by the government on remaining imports.

A specific tariff is a fixed monetary amount per unit imported (e.g. $5 per tonne). An ad valorem tariff is a percentage of the value of the imported good (e.g. 20% of the price).

The world supply curve shifts upward by the amount of the tariff. This raises the domestic price, reduces imports, and increases domestic production.

Production inefficiency (resources used by less efficient domestic producers) and consumption inefficiency (consumer surplus lost from reduced consumption). Together they represent welfare loss.

The government earns tariff revenue (tax per unit × quantity imported). This can fund public services but may be offset by the overall welfare loss to the economy.

Consumer surplus falls because the domestic price rises. Consumers pay more per unit and buy fewer units. Part of the lost consumer surplus transfers to producers and the government; the rest is deadweight loss.

Foreign producers lose market share as their goods become more expensive in the domestic market. They sell fewer units and earn less revenue, which may lead to retaliatory trade measures.

The US imposed a 25% tariff on Chinese steel imports in 2018 to protect its domestic steel industry, raising the price of imported steel and benefiting US steelmakers.

Domestic producers (higher prices, more sales), the government (tariff revenue), and domestic workers in the protected industry (more jobs). Consumers and foreign producers lose.

There is a net welfare loss to society because the deadweight loss triangles (production and consumption inefficiency) are not offset by the gains to producers and the government. Total surplus falls.

Producer surplus increases because domestic firms sell at a higher price and produce a larger quantity. The gain in producer surplus comes at the expense of consumers.

An import quota is a legal limit on the quantity (or value) of a good that can be imported into a country within a given time period.

A government payment to domestic producers that lowers their production costs, enabling them to compete with cheaper foreign imports without directly taxing imports.

Both raise the domestic price, reduce imports, increase domestic production, and reduce consumer surplus. Both create a welfare loss and protect domestic producers from competition.

A subsidy does not raise the domestic price for consumers. It increases domestic production without reducing consumption, so consumer surplus is maintained. However, it has an opportunity cost for the government.

A tariff generates government revenue, but a quota does not — the extra revenue (quota rent) goes to whoever holds the import licences, often foreign exporters or domestic importers.

A government payment to domestic firms that lowers the cost of goods sold abroad, making exports cheaper and more competitive in international markets.

The subsidy shifts the domestic supply curve rightward (downward), as firms can now produce at a lower cost per unit. This increases domestic output and reduces the need for imports.

A quota guarantees a maximum import quantity regardless of price changes, giving more certain protection. A tariff's effectiveness depends on price elasticity — if foreign firms absorb the cost, imports may not fall much.

The domestic price rises above the world price because the restricted supply of imports creates a shortage at the original price, pushing the price up until a new equilibrium is reached.

The supply curve becomes the domestic supply plus the quota amount. At the quota limit, the supply curve becomes vertical (perfectly inelastic), showing no additional imports are allowed beyond that quantity.

Tariffs are the most transparent because the tax rate is publicly known. Quotas and subsidies are less visible, and administrative barriers are the least transparent, making them harder to challenge under WTO rules.

Subsidies must be funded through taxation or government borrowing. The opportunity cost is the alternative use of those funds — e.g. healthcare, education, or infrastructure that cannot be funded.

Yes. Tariffs and quotas create two welfare-loss triangles. Subsidies create a deadweight loss triangle from production inefficiency (resources used where they shouldn't be). All three reduce overall economic efficiency.

The EU has used quotas to limit the import of Chinese textiles to protect European manufacturers from low-cost competition.

The EU Common Agricultural Policy (CAP) provides large subsidies to European farmers, allowing them to sell below production cost and making it difficult for developing-country farmers to compete in EU markets.

A VER is an agreement in which an exporting country voluntarily limits the quantity of goods it exports to another country, usually under diplomatic pressure from the importing country.

Government regulations, bureaucratic procedures, or technical requirements that make importing more difficult without imposing an explicit tariff or quota. Examples include health standards, safety regulations, and customs delays.

WTO negotiations have successfully reduced average tariff levels worldwide. Countries have shifted to harder-to-detect NTBs (regulations, standards, subsidies) to continue protecting domestic industries.

Tariffs are transparent — the rate is publicly stated. NTBs are often embedded in domestic regulation (safety, health, environment) making it difficult to separate legitimate policy from disguised protectionism.

In the 1980s, Japan agreed to limit car exports to the US after pressure from the US government, which feared Japanese competition would destroy its domestic auto industry.

1) Product standards and testing requirements. 2) Complex customs procedures and excessive paperwork. 3) Health and safety regulations applied more strictly to imports than domestic goods.

They often disguise protectionist intent behind legitimate goals (public health, safety, environment). It is hard to prove that a regulation is designed to block trade rather than genuinely protect citizens.

VERs distort trade and lack transparency. The WTO Agreement on Safeguards (1994) effectively banned new VERs, though countries sometimes use informal pressure to achieve similar outcomes.

Developing countries often lack the technical capacity, testing facilities, and legal resources to comply with complex standards set by rich countries, effectively excluding them from lucrative export markets.

Exporters must comply with different standards in each market, pay for testing/certification, deal with slow customs processing, and hire legal/compliance staff. This raises the cost and deters trade.

A quota is imposed by the importing country. A VER is "voluntarily" agreed by the exporting country (under pressure). The economic effects are similar, but VERs allow the exporting country to capture the quota rent.

The WTO has agreements on Technical Barriers to Trade (TBT) and Sanitary and Phytosanitary (SPS) measures that aim to ensure regulations are not disguised protectionism. Countries can file disputes if they believe standards are unfair.

Japan has been accused of using strict food safety testing requirements on imported agricultural goods that go beyond what is scientifically necessary, effectively limiting imports while appearing to protect public health.

Not necessarily. Some NTBs serve legitimate purposes — protecting consumer health, ensuring product safety, and safeguarding the environment. The challenge is distinguishing genuine regulation from disguised protectionism.

Government procurement policies (favouring domestic firms in contracts), local content requirements (requiring a % of inputs to be domestic), and exchange rate manipulation (devaluing the currency to make exports cheaper).

A tariff raises the import price by the tariff amount. KEY AREAS: a = consumer surplus lost to domestic producers (transfer). b = production inefficiency (DWL — domestic firms produce at higher cost). c = government revenue (tariff × imports). d = consumption inefficiency (DWL — consumers lose surplus). CS loss = a+b+c+d. PS gain = a. Gov revenue = c. Net DWL = b+d.

Tariff revenue = tariff per unit × quantity of imports after tariff. Imports after = Qd(at Pw+t) − Qs(at Pw+t). It's rectangle 'c' on the diagram, between domestic supply and domestic demand at the tariff-inclusive price, with height = tariff amount.

Triangle b (production DWL): resources wasted because inefficient domestic firms now produce units that could have been imported more cheaply. Triangle d (consumption DWL): consumer surplus lost from units no longer consumed due to the higher tariff-inclusive price. Together, b + d = net welfare loss to society.

Triangle b = ½ × (Qs_tariff − Qs_free) × tariff. Triangle d = ½ × (Qd_free − Qd_tariff) × tariff. Rectangle a (PS gain) = (Qs_free + Qs_tariff)/2 × tariff (or trapezoid formula). Rectangle c = tariff × (Qd_tariff − Qs_tariff). All areas can be calculated with the supply/demand intercepts.

b = ½ × (35−20) × 5 = ½ × 15 × 5 = $37.50. d = ½ × (100−80) × 5 = ½ × 20 × 5 = $50. c = 5 × (80−35) = 5 × 45 = $225. Total DWL = 37.50 + 50 = $87.50. Government revenue = $225. CS lost = a + 37.50 + 225 + 50 = a + 312.50.

For a LARGE country that can influence world prices: a tariff can LOWER the import price (foreign suppliers absorb some of the tariff). The terms of trade gain may exceed the DWL. This is the 'optimal tariff' argument. For SMALL countries: can't influence Pw, so tariff = pure DWL. In practice, retaliation risk makes this risky.

Key difference: with a quota, there is NO government revenue (area c goes to foreign exporters as QUOTA RENT or to domestic importers with licences, depending on who holds the import licences). DWL triangles b and d are the SAME as an equivalent tariff. So quotas are WORSE for the importing country than an equivalent tariff.

Quota rent = the extra revenue earned on imported units due to the artificially higher domestic price. It's equivalent to area 'c' in the tariff diagram. WHO gets it depends on allocation: if foreign exporters get licences → rent goes abroad. If domestic importers buy licences → rent stays home. If auctioned by government → becomes like tariff revenue.

1) Less transparent (harder to see the cost to consumers). 2) No government revenue (unless auctioned). 3) Create rent-seeking (lobbying for import licences → resources wasted). 4) Less flexible — in growing markets, a fixed quota becomes more restrictive over time. 5) Corruption risk in licence allocation.