4Narula R and Wakelin K.. Technological competitiveness, trade and foreign direct investment[J]. Structural Change and Economic Dynamics, 1998, (9) : 373- 387.
5Wolfgang Keller ~ Stephen R. Yeaple, 2003. Multinational enterprises, international trade, and productivity growth: firm-level evidence from the united states[J]. NBER Working.?apers 9504, National Bureau of Economic Research, Inc.
6Liu, X. and C. Shu. Determinants of export performance, evi- dence from chinese industries l-J']. Economies of Planning, 2003, (36) :45-67.
7Gleijser, Herbert, Alexis P. Jaequemin, Jean Petit, 1980. Ex- ports in an imperfect competition framework., an analysis of 1, 446 exporters[J]. The Quarterly Journal of Economies, 1980,(94):507--524.
