Trade policy refers to the rules and regulations that govern a country's trade. The main instruments of trade policy are tariffs, subsidies, import quotas, voluntary export restraints, local content requirements, administrative policies, and antidumping duties. Tariffs are taxes on imports or exports, subsidies are government payments to domestic producers, and quotas directly limit the quantity of goods that can be imported. The goal of these policies is typically to protect domestic industries and increase government revenues, but they can also help domestic producers gain export markets.