Why countries implement trade restrictions

Why countries implement trade restrictions despite negative consequences. Trade restrictions are implemented to protect certain industries that are deemed tactically important for the safeguard of national security. Defence industries most often receives significant level of protection as it is viewed as crucial to national interest. The government of a developing economy will levy tariffs on imported goods in industries in which it wants to foster growth. This increases the prices of imported goods and creates a domestic market for domestically produced goods while protecting those industries from being forced out by more competitive pricing.