Average most-favored-nation tariffs in the "Quad" (Canada, the European Union, Japan, and the United States) have fallen to about 5 percent. But tariffs more than three times the average most-favored-nation duty are not uncommon in the Quad and have a disproportionate effect on exports of least...

High levels of protection and domestic support for farmers in industrial countries significantly affect many developing countries, both directly and through the price-depressing effect of agricultural support policies. High tariffs--in both rich and poor countries--and domestic support may also...