Empirical analysis on factors associated with international scientific collaboration

在研究活动国际化的背景下，国际合作的相关因素和国际合作论文高被引率背后的原因这两大主题仍未得到研究。因此，本研究利用学术论文的元信息对这两个主题进行实证分析。利用计数数据回归模型对过去20年发表在《自然》和《科学》杂志上的论文进行分析后得出的结果之一表明，有几个因素与学术论文的产量呈正相关：研发投入和研究人员数量、国际学生数量和欧盟成员国数量。利用化学领域论文数据库进行的分析显示，研究绩效（论文数量及其被引用次数）与国际合作程度呈正相关。

Under internationalization of research activities,two major themes have still not been investigated: factors related to international co-authorship and the reasons behind the higher citation rates of internationally-collaborated articles. Therefore, this study examines those two themes by empirical analysis using meta-information of academic papers. One of the results gained from analysis on papers published in the past 20 years in Nature and Science using a count data regression model indicated several factors that have a positive relationship with the production of academic papers: investment on R&D and the number of researchers, the number of international students, and European Union membership. Analysis using a database of papers in the field of chemistry showed positive correlations between research performance (number of papers and their times cited) and the degree of international collaboration.