This document discusses tariff and non-tariff barriers in international trade. It defines tariffs as customs duties or taxes on imported products. It lists various types of tariff barriers such as specific duties, ad valorem duties, and protective tariffs. Non-tariff barriers are any barriers other than tariffs that restrict free trade, such as quotas, product standards, labeling requirements, and foreign exchange regulations. The document notes that tariffs affect prices while non-tariff barriers affect quantities. It concludes by comparing tariffs and non-tariff barriers, noting things like tariffs generate government revenue while non-tariffs protect domestic industries.