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11.
We investigate the relationship between patenting activity and the population size of metropolitan areas in the United States over the last two decades (1980-2001). We find a clear superlinear effect, whereby new patents are granted disproportionately in larger urban centers, thus showing increasing returns in inventing activity with respect to population size. We characterize this relation quantitatively as a power law with an exponent larger than unity. This phenomenon is commensurate with the presence of larger numbers of inventors in larger metropolitan areas, which we find follows a quantitatively similar superlinear relationship to population, while the productivity of individual inventors stays essentially constant across metropolitan areas. We also find that structural measures of the patent co-authorship network although weakly correlated to increasing rates of patenting, are not enough to explain them. Finally, we show that R&D establishments and employment in other creative professions also follow superlinear scaling relations to metropolitan population size, albeit possibly with different exponents. 相似文献
12.
Like the US before it, Japan has adopted a series of policy initiatives designed to encourage the commercialization of academic science. However, such initiatives may also adversely affect “open-science”. Based on matched surveys of almost 1000 researchers in Japan and over 800 in the US, the paper examines rates of commercial activity, reasons to patent, and secrecy related to research results. In particular, it examines the extent to which participation in commercial activity is associated with publication secrecy. The results show that patenting rates are higher in Japan, while industry funding is more common in the US. In addition, the overall level of publication secrecy is greater in Japan. And, in both countries, individuals who are commercially active are less likely to share their research results through publication. But, patents are less directly linked to commercial activity in Japan than in the US, and have less impact on academic secrecy. The results suggest that academic entrepreneurship is associated with reduced participation in open science, but that the extent of adverse effects depends significantly on institutional context. 相似文献