This paper examines the effect of experiencing a research collaboration between African scientists and their international partners on the African scientists’ research impact, measured by scores based on the number of citations and journal impact factor. Using a difference-in-difference regression analysis on publication data of African scientists, the results show that international research collaboration in a given year has a positive and significant effect on research impact, which lasts in the subsequent years. The presence of such permanent effect suggests a sort of ‘permanent learning by international collaboration’. The positive effect of international collaboration on research impact, however, does not necessarily imply that the scientists with only local research collaboration are lesser scientists.

中文翻译：

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经历国际研究合作是否会永久影响科学生产的影响？来自非洲的证据

本文研究了非洲科学家与其国际合作伙伴之间的研究合作对非洲科学家的研究影响的影响，该影响通过基于引用次数和期刊影响因子的分数来衡量。对非洲科学家的发表数据进行差中回归分析，结果表明，某一年的国际研究合作对研究影响具有积极而显着的影响，这种影响会持续到随后的几年。这种永久效应的存在表明了一种“国际合作的永久学习”。然而，国际合作对研究影响的积极影响并不一定意味着只有本地研究合作的科学家是较少的科学家。