... product sector.2 Third, preferential rules of origin (RoO) in textiles and apparel were among the most costly and influential of any U.S. RoO. These rules applied to the 28 percent of U.S. ... results highlight the important effects of preferential rules of origin. While quantitative restraints had the largest effect on welfare, rules of origin had by far the largest effect on production ... Estevadeordal, Antoni and Kati Suominen. 2006. “Mapping and Measuring Rules of Origin Around the World.” In The Origin of Goods: Rules of Origin in Regional Trade Agreements, ed. Olivier Cadot,...