"Rules of origin are legitimate policy instruments to prevent trade deflection in a preferential trade agreement short of a customs union. Trade deflection takes place when a product imported into the preferential trade agreement through the member with the lowest external tariff is transhipped...

"Regional agreements on standards have been largely ignored by economists and unconditionally blessed by multilateral trade rules. Chen and Mattoo find, theoretically and empirically, that such agreements increase trade between participating countries but not necessarily with the rest of the...