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Geography, Ties, and Knowledge Flows: Evidence from Citations in Mathematics

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  • Head, Keith
  • Li, Yao Amber
  • Minondo, Asier

Abstract

Using data on academic citations, career and educational histories of mathematicians, and disaggregated distance data for the world's top 1000 math departments, we study how geography and ties affect knowledge flows among scholars. The ties we consider are coauthorship, past colocation, advisor-mediated relationships, and alma mater relationships (holding a Ph.D. from the institution where another scholar is affiliated). Logit regressions using fixed effects that control for subject similarity, article quality, and temporal lags, show linkages are strongly associated with citation. Controlling for ties generally halves the negative impact of geographic barriers on citations. Ties matter more for less prominent and more recent papers and show no decline in importance in recent years. The impact of distance--controlling for ties--has fallen and is statistically insignificant after 2004.

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  • Head, Keith & Li, Yao Amber & Minondo, Asier, 2018. "Geography, Ties, and Knowledge Flows: Evidence from Citations in Mathematics," CEPR Discussion Papers 12942, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:12942
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    10. Sultan Orazbayev, 2017. "Diversity and collaboration in Economics," UCL SSEES Economics and Business working paper series 2017-4, UCL School of Slavonic and East European Studies (SSEES).
    11. Donald E. Bowen III & Laurent Frésard & Jérôme P. Taillard, 2017. "What’s Your Identification Strategy? Innovation in Corporate Finance Research," Management Science, INFORMS, vol. 63(8), pages 2529-2548, August.
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    15. Asier Minondo, 2017. "Fundamental Versus Granular Comparative Advantage: An Analysis Using Chess Data," Kyklos, Wiley Blackwell, vol. 70(3), pages 425-455, August.
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    22. Mignon Wuestman & Koen Frenken & Iris Wanzenböck, 2020. "A genealogical approach to academic success," PLOS ONE, Public Library of Science, vol. 15(12), pages 1-16, December.
    23. Favaro, Donata & Ninka, Eniel, 2019. "Inventors’ working relationships and knowledge creation: a study on patented innovation," INVESTIGACIONES REGIONALES - Journal of REGIONAL RESEARCH, Asociación Española de Ciencia Regional, issue 45, pages 55-76.
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    • O3 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights
    • R1 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics

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