论文标题
地理邻近性在知识扩散中的作用，通过引用对科学文献的引用来衡量
The role of geographic proximity in knowledge diffusion, measured by citations to scientific literature
论文作者
论文摘要
本文分析了通过引用对科学出版物的引用来衡量的地理距离对知识流的影响。以前使用相同方法的工作仅限于单一学科。在这项研究中，我们分析了2012年至2012年成熟的所有学科的意大利科学生产。为了计算引用和引用出版物之间的地理距离，每个人都根据作者的隶属关系与“普遍”领域相关联。使用普通最小二乘回归估算的重力模型的应用结果表明，尽管存在扩散，但地理距离仍然是领土之间知识流动过程中的影响因素。特别是，该分析表明，地理距离对知识流的影响在国家一级很重要，在大陆层面不可忽略，但在洲际层面完全不相关。
This paper analyses the influence of geographic distance on knowledge flows, measured through citations to scientific publications. Previous works using the same approach are limited to single disciplines. In this study, we analyse the Italian scientific production in all disciplines matured in the period 2010-2012. To calculate the geographic distances between citing and cited publications, each one is associated with a "prevalent" territory on the basis of the authors' affiliations. The results of the application of a gravity model, estimated using ordinary least squares regression, show that despite the spread of IT, geographic distance continues to be an influential factor in the process of knowledge flows between territories. In particular, the analysis reveals that the effect of geographic distance on knowledge flows is significant at the national level, not negligible at the continental level, but completely irrelevant at the intercontinental level.
