Interindustry R&D Spillovers, Rates of Return, and Production in High-Tech Industries
估计了五个高技术产业间研发溢出的生产率和要素偏向效应，计算了研发资本的私人和社会回报率，发现社会回报率高于私人回报率，且不同产业作为溢出源的重要性存在显著差异。
This paper presents estimates of the productivity and factor bias effects of interindustry R&D spillovers for five high-tech industries. Each industry is distinguished as a separate spillover source. The industries are each affected by R&D spillovers and are themselves spillover sources. Thus a spillover network between the industries is estimated. Private and social rates of return to R&D capital are calculated. The private rates of return are generally greater than the returns to physical capital. In addition, the social rates of return are greater than the private rates. The results show that there are significant differences between industries as to their importance as sources of R&D spillovers.