How do tariffs limit international trade?

Tariffs limit international trade primarily by acting as a tax on foreign goods, which increases their cost and makes them less attractive to consumers compared to domestic products. By raising the price of imports, tariffs discourage consumption of foreign commodities and can lead to a reduction in demand.123

This process serves as a form of protectionism, intended to shield domestic industries from foreign competition. However, these barriers often distort markets and can trigger retaliatory measures from trading partners, potentially escalating into trade wars that disrupt global supply chains and weaken economic growth. Historically, such cycles of protectionism have led to significant declines in global trade.231

To mitigate these negative impacts, the World Trade Organization (WTO) works to supervise and liberalize world trade by encouraging member nations to reduce or eliminate customs tariffs. While tariffs may be used to protect specific industries or raise revenue, the consensus among economists is that open markets generally support broader prosperity and efficiency.24516