5Frohlich M T,Westbrook R.Demand chain management in manufacturing and services:web-based integration,drivers and performance[J].Journal of Operations Management,2002;20:729~745
6Luis G,Kaplan S N.The effects of business-to-business e-commerce on transaction costs[J].The Journal of Industrial Economics,2001; 4:463 ~485
7Dai Q,Kauffman R J.To be or not to B2B? An evaluation model for e-procurement channel adoption[R].Carlson School of Management Working Paper,University of Minnesota,2000
8UNCTAD.E-Commerce and development report 2004[R].United Nations Publication,New York and Geneva,2004
9Spengler J J.Vertical integration and antitrust policy[J].Journal of Political Economy,1950; 58:347~352
10Pindyck R S,Rubinfeld D L.Microeconomics[M].6th edition,New Jersey:Prentice-Hall Press,2004