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The generational gap of science: a dynamic cluster analysis of doctorates in an evolving scientific system


  • João M. Santos

    (University of Lisbon)

  • Hugo Horta

    (The University of Hong Kong)


The features of science and technology (S&T) systems change over time. Simultaneously, at an individual level, the characteristics of actors in these systems also change concomitantly. In this study, the characteristics of doctorates in a changing S&T system are analyzed. This is performed by a series of cluster analyses on doctorates—with the goal of identifying shifting profiles—in strategic periods spanning three decades, which represents milestones in an evolving S&T system. A series of archetypal profiles of doctorates are identified, including changes to the relative weights of each of them, along with a pattern of alternating convergence and divergence over time on the characteristics of these doctorates.

Suggested Citation

  • João M. Santos & Hugo Horta, 2015. "The generational gap of science: a dynamic cluster analysis of doctorates in an evolving scientific system," Scientometrics, Springer;Akadémiai Kiadó, vol. 104(1), pages 381-406, July.
  • Handle: RePEc:spr:scient:v:104:y:2015:i:1:d:10.1007_s11192-015-1558-x
    DOI: 10.1007/s11192-015-1558-x

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    References listed on IDEAS

    1. Levin, Sharon G & Stephan, Paula E, 1991. "Research Productivity over the Life Cycle: Evidence for Academic Scientists," American Economic Review, American Economic Association, vol. 81(1), pages 114-132, March.
    2. Gonzalez-Brambila, Claudia & Veloso, Francisco M., 2007. "The determinants of research output and impact: A study of Mexican researchers," Research Policy, Elsevier, vol. 36(7), pages 1035-1051, September.
    3. Almeida, J.A.S. & Pais, A.A.C.C. & Formosinho, S.J., 2009. "Science indicators and science patterns in Europe," Journal of Informetrics, Elsevier, vol. 3(2), pages 134-142.
    4. Pinheiro, Diogo & Melkers, Julia & Youtie, Jan, 2014. "Learning to play the game: Student publishing as an indicator of future scholarly success," Technological Forecasting and Social Change, Elsevier, vol. 81(C), pages 56-66.
    5. Dietz, James S. & Bozeman, Barry, 2005. "Academic careers, patents, and productivity: industry experience as scientific and technical human capital," Research Policy, Elsevier, vol. 34(3), pages 349-367, April.
    6. Rodrigo Costas & Thed N. van Leeuwen & María Bordons, 2010. "A bibliometric classificatory approach for the study and assessment of research performance at the individual level: The effects of age on productivity and impact," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 61(8), pages 1564-1581, August.
    7. Cruz-Castro, Laura & Sanz-Menéndez, Luis, 2010. "Mobility versus job stability: Assessing tenure and productivity outcomes," Research Policy, Elsevier, vol. 39(1), pages 27-38, February.
    8. Marianne Gauffriau & Peder Olesen Larsen & Isabelle Maye & Anne Roulin-Perriard & Markus Ins, 2008. "Comparisons of results of publication counting using different methods," Scientometrics, Springer;Akadémiai Kiadó, vol. 77(1), pages 147-176, October.
    9. Jonathan Chaloff & Georges Lemaître, 2009. "Managing Highly-Skilled Labour Migration: A Comparative Analysis of Migration Policies and Challenges in OECD Countries," OECD Social, Employment and Migration Working Papers 79, OECD Publishing.
    10. Laudeline Auriol, 2010. "Careers of Doctorate Holders: Employment and Mobility Patterns," OECD Science, Technology and Industry Working Papers 2010/4, OECD Publishing.
    11. Heitor, Manuel & Horta, Hugo & Mendonça, Joana, 2014. "Developing human capital and research capacity: Science policies promoting brain gain," Technological Forecasting and Social Change, Elsevier, vol. 82(C), pages 6-22.
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