1. ``Analysis of Performance Standards for Direct Foreign Investments,'';Davidson;Canadian Journal of Economics,1987
2. ``Trade and Protection with Multistage Production,'';Dixit;Review of Economic Studies,1982
3. Falvey , R. E. and G. V. Reed ``Rules of Origin as Commercial Policy Instruments,'' EPRU Working Paper 1997-20 Copenhagen Business School 1997
4. and ``Economic Effects of Rules of Origin,'' Weltwirtschaftliches Archiv 134 1998 209 29