摘要：The value of social network analysis is critically dependent on thecomprehensive and reliable identification of actors and their relationships.We compare regional knowledge networks based on different types ofdata sources, namely, co-patents, co-publications, and publicly subsidizedcollaborative R&D projects. Moreover, by combining these three datasources, we construct a multilayer network that provides a comprehensivepicture of intraregional interactions. By comparing the networks based onthe data sources, we address the problems of coverage and selectionbias. We observe that using only one data source leads to a severeunderestimation of regional knowledge interactions, especially those ofprivate sector firms and independent researchers. The key role ofuniversities that connect many regional actors is identified in all threetypes of data.
