创新网络生成因素的重要性识别研究——以上海医药产业为例

本文以上海医药产业为研究对象,基于随机森林模型检验了诸多因素对于创新网络生成和拓扑的影响,并且对这些生成因素的重要性进行了识别研究。研究发现:(1)创新网络个体属性为大学或者科研机构对于网络生成的影响最为重要,表明公共研发机构的知识外溢是网络生成重要动力;(2)创新网络个体的节点度有助于进一步的创新合作,证明了"合作的竞争"机制是网络生成的重要驱动力;(3)社交网络与专利维权能力影响次之,表明网络链接的外生交易成本和内生交易成本对医药产业创新网络生成有重要影响;(4)企业自身的技术创新能力、知识的互补性与知识的多样性对于网络的生成帮助并不大,表明现阶段上海医药产业内企业之间创新合作的意向性并不强,同时发现了大企业创新合作中存在着"越强越狭隘"的现象。

Formation Mechanism of Collaborative Innovation Network:A Study of Stochastic Forest Model on the Shanghai Pharmaceutical Industry

This paper uses random forest models to identify factors on the Shanghai pharmaceutical industry’s formation of innovation networks.The paper finds:(1)Universities or the scientific research institutes have the most critical influences on innovation networks,demonstrating a positive effect of the knowledge spillover from public research institutes in the pharmaceutical industry;(2)Node position has a positive impact on innovation cooperation,which demonstrates the market mechanism of cooperative competition is the inner drive for innovation networks;(3)The social network and patent protection,an indicator of exogenous and endogenous transaction cost,have an important impact on the innovation networks in the pharmaceutical industry;(4)Pharmaceutical firms’innovative capability has little influence on the innovation network,which confirms that firms with more market power are less likely to cooperate in innovation.