One reason that international trade is restricted is that

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International trade may be restricted due to the political pressure from certain interest groups that stand to lose from increased competition from foreign industries. Although the overall benefits of free trade may outweigh the individual losses, the affected groups (e.g. domestic producers and labor unions) may lobby their governments to implement protectionist measures to safeguard their interests. These protectionist measures, such as tariffs and quotas, can lead to higher prices for consumers and reduced economic efficiency, but the individual gain to the protected parties may be large enough to outweigh these costs. Therefore, the decision to restrict trade often involves a trade-off between the overall benefits of free trade and the individual costs of protectionism.

One Reason That International Trade Is Restricted Is That