Centre for Science and Technology Studies Centre for Science and Technology Studies 2333AL Leiden Zuid Holland 31715273909

Vincent Traag, PhD

Vincent Traag is a senior researcher at the Centre for Science and Technology Studies (CWTS) of Leiden University in the Netherlands. He leads the research line on modelling the research system within the Quantitative Science Studies (QSS) research group. His main interests are mathematical models in the social sciences with a focus on (social) networks. In addition to his scientific research, Traag also acts as a bibliometric consultant at the CWTS.

Traag obtained his Master in sociology (cum laude) from the University of Amsterdam (2008). Coming from a computer science background, and taking up mathematics during his studies in sociology, he went on to obtain a PhD in applied mathematics in Louvain-la-Neuve, Belgium (2013). During his PhD he studied methods for detecting communities in complex networks, resulting in a Python software package. In addition, he applied this methodology in several fields across the (social) sciences, ranging from citation networks to international relations. He joined the CWTS in 2015.

More information can be found on his personal website.



Journal publications (27)

  • Boekhout, H.D., Traag, V.A., & Takes, F.W. (2021). Investigating scientific mobility in co-authorship networks using multilayer temporal motifs. Network Science, 9(3), 354-386. (paper)
  • Colavizza, G., Costas, R., Traag, V.A., Van Eck, N.J., Van Leeuwen, T.N., & Waltman, L. (2021). A scientometric overview of CORD-19. PLoS ONE, 16(1), e0244839. (paper)
  • Traag, V.A. (2021). Inferring the causal effect of journals on citations. Quantitative Science Studies, 2(2), 496-504. (paper)
  • Akbaritabar, A., Traag, V.A., Caimo, A., & Squazzoni, F. (2020). Italian sociologists: a community of disconnected groups. Scientometrics, 124(3), 2361-2382. doi:10.1007/s11192-020-03555-w (paper)
  • Berbers, A., Uitermark, J., Traag, V.A., & d'Haenens, L. (2020). From the margin to the centre? A relational analysis of discursive contention in the minority integration debate in the Low Countries. International Communication Gazette, 82(8), 705-725. doi:10.1177/1748048519842476 (paper)
  • Subelj, L., Waltman, L., Traag, V.A., & Van Eck, N.J. (2020). Intermediacy of publications. Royal Society Open Science, 7(1), 190207. (paper)
  • Waltman, L., & Traag, V.A. (2020). Use of the journal impact factor for assessing individual articles need not be statistically wrong, 9. F1000 Research, 366. doi:10.12688/f1000research.23418.1 (paper)
  • Traag, V.A., & Waltman, L. (2019). Systematic analysis of agreement between metrics and peer review in the UK REF, e29. Palgrave Communications, 5. (paper)
  • Traag, V.A., Waltman, L., & Van Eck, N.J. (2019). From Louvain to Leiden: guaranteeing well-connected communities, e5233. Scientific Reports, 9. (paper)
  • Traag, V.A., Quax, R., & Sloot, P.M.A. (2017). Modelling the distance impedance of protest attendance. Physica A, 468, 171-182. (paper)
  • Waltman, L., & Traag, V.A. (2017). Impact factors: Is the Nature Index at odds with DORA? (Correspondence). Nature, 545(7655), 412-412. (paper)
  • Traag, V.A. (2016). Complex Contagion of Campaign Donations. PLoS ONE, 11(4), e0153539. (paper)
  • Uitermark, J., Traag, V.A., & Bruggeman, J. (2016). Dissecting discursive contention: A relational analysis of the Dutch debate on minority integration, 1990-2006. Social Networks, 47, 107-115. (paper)
  • Hicks, J., Traag, V.A., & Reinanda, R. (2015). Old questions, new techniques: a research note on the computational identification of political elites. Comparative Sociology, 14(3), 386-401. (paper)
  • Hicks, J., Traag, V.A., & Reinanda, R. (2015). Turning Digitised Newspapers into Networks of Political Elites. Asian Journal of Social Science, 43(5), 567-587. doi:10.1163/15685314-04305004 (paper)
  • Traag, V.A. (2015). Faster unfolding of communities: Speeding up the Louvain algorithm. Physical Review E, 92(3), 032801. (paper)
  • Traag, V.A., Aldecoa, R., & Delvenne, J.C. (2015). Detecting communities using asymptotical surprise. Physical Review E, 92(2), e022816. (paper)
  • Traag, V.A., Reinanda, R., & Van Klinken, G. (2015). Elite Co-Occurrence in the Media. Asian Journal of Social Science, 43(5), 588-612. (paper)
  • Thomas, C.J., Lambrechts, J., Wolanski, E., Traag, V.A., Blondel, V.D., Deleersnijder, E., & Hanert, E. (2014). Numerical modelling and graph theory tools to study ecological connectivity in the Great Barrier Reef. Ecological Modelling, 272, 160-174. doi:10.1016/j.ecolmodel.2013.10.002 (paper)
  • Csaji, B.C., Browet, A., Traag, V.A., Delvenne, J.C., Huens, E., Van Dooren, P., Smoreda, Z., & Blondel, V.D. (2013). Exploring the mobility of mobile phone users. Physica A, 392(6), 1459-1473. doi:10.1016/j.physa.2012.11.040 (paper)
  • Lupu, Y., & Traag, V.A. (2013). Trading Communities, the Networked Structure of International Relations, and the Kantian Peace. Journal of Conflict Resolution, 57(6), 1011-1042. (paper)
  • Traag, V.A., Kriegsman, L., & Van Dooren, P. (2013). Significant Scales in Community Structure, 3. Scientific Reports, 2930. doi:10.1038/srep02930 (paper)
  • Traag, V.A., Van Dooren, P., & De Leenheer, P. (2013). Dynamical models explaining social balance and evolution of cooperation. PLoS ONE, 8(4), e60063. doi:10.1371/journal.pone.0060063 (paper)
  • Bruggeman, J., Traag, V.A., & Uitermark, J. (2012). Detecting Communities through Network Data. American Sociological Review, 77(6), 1050-1063. doi:10.1177/0003122412463574 (paper)
  • Uitermark, J., Traag, V.A., & Bruggeman, J. (2012). De strijd om discursieve macht. Sociologie, 8(2), 219-247. (paper)
  • Traag, V.A., & Van Dooren, P. (2011). Narrow scope for resolution-limit-free community detection. Physical Review E, 84(1), 016114. doi:10.1103/PhysRevE.84.016114 (paper)
  • Traag, V.A., & Bruggeman, J. (2009). Community detection in networks with positive and negative links. Physical Review E, 80(3), 036115. doi:10.1103/PhysRevE.80.036115 (paper)

Conference publications (4)

  • Subelj, L., Waltman, L., Traag, V.A., & Van Eck, N.J. (2019). Intermediacy of publications. In Proceedings of the 17th International Conference of the International Society for Scientometrics and Informetrics (pp. 1288-1300).
  • Traag, V.A., Browet, A., Calabrese, F., & Morlot, F. (2011). Social event detection in massive mobile phone data using probabilistic location inference. In (pp. 625-628). (paper)
  • Traag, V.A., Van Dooren, P., & Nesterov, Y.E. (2011). Indirect reciprocity through gossiping can lead to cooperative clusters. In Proceedings of the 2011 IEEE Symposium on Artificial Life (pp. 154-161). doi:10.1109/ALIFE.2011.5954642 (paper)
  • Traag, V.A., Nesterov, Y.E., & Van Dooren, P. (2010). Exponential ranking: taking into account negative links. In Social Informatics (pp. 192-202). doi:10.1007/978-3-642-16567-2_14 (paper)

Book chapters (1)

  • Traag, V.A., Reinanda, R., & Van Klinken, G. (2016). Structure of a Media Co-occurrence Network. Springer Proceedings in Complexity. In S. Battiston, F. De Pellegrini, G. Caldarelli, & E. Merelli (Eds.), Proceedings of 2014 European Conference on Complex Systems (pp. 81-91). doi:10.1007/978-3-319-29228-1_8 (paper)

Senior researcher and bibliometric consultant

T: +31 71 527 3943

E: v.a.traag@cwts.leidenuniv.nl

W: www.traag.net

ORCID: 0000-0003-3170-3879

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