6Benjamin B.M. Shao, Winston T. Lin. Technical Efficiency Analysis of Information Technology Investments: A Two-stage Empiri- cal Investigation[J]. Information&Management, 2002(39):391--401.
7Eaton, Kortun S. International patenting and technology dif- fusion: theory and evidence [ J ]. International Economic Review, 1999,40(3) :537-570.
8Frantzena D. Human capital and international technology sp- illovera:a cross-country analysis [ J]. Scandinavian Jotmaal of Eco- nomics, 2000,102( 1 ) : 57-75.
10Greenwood,L, Hemowitz, Z., Gregory, W. H. Invest- raent, Capacity Utilization, and the Real Business Cycle[ J]. The American Economic Review, 1988, (6) :402 - 417.