Tariffs: The United States has implemented tariffs on a range of products, including steel, aluminum, and solar panels, in an effort to protect domestic industries from foreign competition. While tariffs can increase the cost of imports and make domestic products more competitive, they can
also lead to retaliatory measures from trading partners and higher costs
for consumers.

Import quotas: Japan has implemented import quotas on rice, which limits the amount of rice that can be imported into the country each year. This policy is designed to protect domestic rice farmers from foreign competition. While this policy has led to higher prices for consumers, it has also ensured the survival of the domestic rice industry.

Subsidies: France provides subsidies to its agricultural sector, which is designed to
support domestic farmers and protect them from foreign competition. While these subsidies can help to ensure the survival of the domestic industry, they can also lead to overproduction and market distortions.

Anti-dumping measures: The European Union has implemented anti-dumping measures on a range of products, including steel, ceramics, and chemicals, which are designed to prevent foreign producers from selling goods below their cost of production in order to gain market share. While these measures can protect domestic producers from unfair competition, they can also lead to higher prices for consumers.

Regulations: China has implemented regulations on a range of products, including automobiles, which are designed to protect domestic producers from foreign competition. These regulations require foreign automakers to form joint ventures with Chinese firms in order to operate in the country, which can make it more difficult for foreign competitors to gain market share. While this policy can protect domestic producers, it can also lead to reduced competition and higher prices for consumers.

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