5UNCTAD, (1999). World Investment Report 1999, P154.
6Ethier, W. J. and J.R. Markusen. Multinational Firms, Technology Diffusion and Trade, Journal of International Economics,1996, 41(1), 1-28.
7Motta, M.. Multinational without Advantages, Mimeo, Barcelona:Universitat Pompeu Fabra, 1996.
8Blomstrom, M. and Kokko, A.. Multinational Corporations and Spillovers, Journal of Economics Surveys, 1988, 12(3),247-278.
9Bernstein, J.l.. Cost of Production, Intra- and Inter-industry R&D Spillovers: Canadian Evidence, Canadian Journal of Economics,1988, (88): 234-347.
10Bernstein, J.I. and M.I., Nadiri. International R&D Spillovers,Rate of Return and Production in Higher-tech Industries, American Economics Review, May, 1988, 429-434.