关键词: 技术能力, 产学研合作, 内部研发, enterprise technical capacities, industrial-university cooperation, internal R&D

Abstract: Taking Enterprise technical capabilities as the starting point, this paper studied using mathematical model the interactive modes of cooperative R&D and internal R&D(basically alternative mode or complementary mode). The technological capabilities of enterprises (mainly the ability of technological innovation and technology absorption capacity) in research cooperation plays the special role of the "threshold" in the interaction of cooperative and internal R&D, that is, with growth of the technical capabilities, research cooperation and internal R&D gradually showing complementary. Subsequently, using OLS, 2SLS, 3SLS to a survey data from Liaoning Province, we further confirmed the existence of "threshold" effects of enterprise technological capabilities. After making control over the endogeneous problem and excluding the abnormal samples, the results of the simultaneous equations model remained robust in most cases. In addition, the size of enterprise patent pool, the number of technical cooperation organizations in which the enterprise had participated, firm size, profitability and other factors has proved an important impact on the average investment amount of internal R&D and cooperative R&D.