Using the economic analysis of preferential liberalization, and the motivation of special-interest groups (well-organize

[answerhappygod]

Using the economic analysis of preferential liberalization, and
the motivation of special-interest groups (well-organized groups
often have political weight that is far in excess of their economic
weight), explain what are the WTO restrictions on customs unions
and free trade areas, and why these restrictions are a good idea
for world trade and economic welfare.