Economists have repeatedly warned against them, NGOs have fought them, and somegovernments have begrudgingly (at least in appearance) signed them. Yet, in the last twentyyears the growth in number of preferential trade agreements (PTAs) has been unabated. Evenmore strikingly, their scope has...

• Trade barriers seriously distort patterns of international trade, allocation of resources, and economic growth. The total economic costs of the barriers are estimated to exceed $475 billion per annum • Partial reform, such as envisaged in the Uruguay Round, would yield benefits of $195...