Technological Opportunities, Intraindustry Spillovers And Firm R&D Intensity[J] . Alessandro Sterlacchini.  Economics of Innovation and New Technology . 1994 (2)
Technological Opportunities, Intraindustry Spillovers And Firm R&D Intensity[J] . Alessandro Sterlacchini.  Economics of Innovation and New Technology . 1994 (2)