3[6]Romer,P.Two Strategies for EeonomicDevelopment:Using Ideas and Producing Ideas,Proceedings of the World Bank Annuor Conference on Development Economics,1992
6James.M.Buchanan.An economic theory of clubs[J].Economics,1965,(32):1-14.
7Asheim T.Interactive,Innovation systems and SME Policy[R].Papers Presented on the EGU Commission on the Organization of Industrial Space residential conference,Gothenburg,Sweden,1998,(8):121-132.