Technological innovation depends on knowledge developed by scientific research. The number of citations made in patents to the scientific literature has been suggested as an indicator of this process of transfer of knowledge from science to technology. We provide an intersectoral insight into this indicator, by breaking down patent citations into a sector-to-sector matrix of knowledge flows. We then propose a method to analyze this matrix and construct various indicators of science intensity of sectors, and the pervasiveness of knowledge flows. Our results indicate that the traditional measure of the number of citations to science literature per patent captures important aspects intersectoral knowledge flows, but that other aspects are not captured. In particular, we show that high science intensity implies that sectors are net suppliers of knowledge in the economic sector, but that science intensity does not say much about pervasiveness of either knowledge use or knowledge supply by sectors. We argue that these results are related to the specific and specialized nature of knowledge.
ABSTRACTOn the basis of a rich panel data set of large- and medium-sized Chinese manufacturing enterprises, we observe that different types of firms (i.e., state-owned enterprises [SOEs], foreign-funded ownership [FFO] of firms, Hong Kong-Macau-Taiwanese [HMT] companies and privately-owned firms) exploit different stages of the innovation – productivity chain depending on the extent of market concentration. By applying a modified CDM model, this study reveals that SOEs tend to be more active in making innovative decisions and pursuing innovative investments but are less efficient in terms of innovation output and labour productivity, whereas FFO firms have relatively high labour productivity but are less active in the first three stages of the innovation – productivity chain. Market competition favours SOEs in the production of additional innovation products. Foreign firms are efficient in labour productivity if they are operating in a concentrated market. By using the metaphor of DNA, this study explains the heterogeneity among these different forms of ownership and generates several managerial implications.
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