Jochem Tolsma

Jochem Tolsma

Professor of Sociology

Radboud University

University of Groningen


Jochem Tolsma is professor by special appointment of Social Divisions between Groups in the Department of Sociology at the University of Groningen, associate professor in the Sociology Department of Radboud University Nijmegen and the program director of the Research Master Social and Cultural Science of Radboud University. In his research he focuses on social divisions between groups; the interplay of segregation, inequality and polarization. His particular areas of interest are the causes and consequences of segregation in neighborhoods, schools and friendship networks.

On this site you you will find some of my R-tutorials (on diagonal reference models, marginal effects, micro-macro models) and an introduction to conceptual models. Conceptual models may help you in organizing your thought process and may help a lay audience in understanding your research ideas. You can still find older versions of my course Social Networks Analysis for social scientists here but I strongly recommend you to check out SNASS to see if I and Bas Hofstra were already able to update the material.

With that, thanks for reading and enjoy!


  • Inequality
  • Segregation
  • Polarization
  • Social Networks
  • Research Methods


  • PhD in Sociology, 2009

    Radboud University, Nijmegen / Interuniversity Center for Social Science Theory and Methodology

  • MSc Social- Cultural Sciences, 2004

    Free University, Amsterdam

  • MSc Natural Sciences, 2002

    Radboud University, Nijmegen

Recent Posts

Recent Publications

Kudos make you run!

We used Strava’s big data to investigate influence dynamics among athletes in online social networks. We constructed a longitudinal dataset of complete networks and behavior over 11 periods with a one-month time window for five different Strava clubs with a total of 329 members. We tested our hypotheses using RSiena. We found that receiving kudos makes you run more and more often and that athletes tended to adjust their running behavior to that of their kudos-friends. But the story is way more nuanced, so check out the complete paper! Together with the paper we constructed a detailed replication repository/website. Long live Open Science!.
Kudos make you run!