3Kiyoshi Kojima."Japanese Direct Investment Abroad",International Christian University, (1990) .
4Raymond Vernon. "International Investment and International Trade in the Product Cycle", Quarterly Journal of Economics, Vol, 80, No.2.
5R Vernon. "The Product Cycle Hypothesis in a New International Environment", Oxford Bulletin of Economics and Statistics, Vol.41, No.4, November 1979.
6Venables, A J . "Localization of Industry and Trade Performance", Oxford Review of Economic Policy.Vol.12.No.3,1996.