7JOHAN HAUKNES,LENART NORDGREN.Economic Rationales of Government Involvement in Innovation and the Sup- ply of Innovation-related Services [M].Oslo:STEP Group, 1999:7.
8U.Witt,Evolution Economics, Edward Elgar Publishing Limited, 1993, p .xxi.
9S.J.LIEBOWITZ.Path Dependence,Lock-in,and History [J]. Journal of Law,Economics,and Organization, 1995,11 (1) : 205-226.
10STEPHEN E .MARGOLIS,S .J.LIEBOWITZ.Path Dependence Entry in The New Palgraves Dictionary of Economics and the Law[J ].MacMillan, 1998(3 ) : 17-22.
