1. Jose Anson, Cadot Olivier, Estevadeordal Antoni, Melo Jaime de, Suwo- Eisenmann Akiko, and Bolorma Tumurchudur, 2003, 'Rules of Origin in north-south preferential trading arrangement with an application to NAFTA,' mimeo
2. Kyle Bagwell, and Robert Staiger, 1998, 'The simple economics of labor standards and the GATT,' NBER Working Paper No. 6604
3. The size of trading blocs Market power and world welfare effects
4. Oliver Cadot, Melo Jamie de, Eisenmann Akiki Suwa, and Bolormaa Tumurchudur, 2002, 'Assessing the effect of NAFTA's Rules of Origin,' mimeo