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...

The European Union, Japan and the United States have recently announced initiatives to improve market access for the poorest countries. How would these initiatives affect Sub-Saharan Africa and the rest of the world