Marijn Keijzer

Marijn Keijzer, MSc is a researcher at the University of Groningen's Faculty of Behavioural and Social Sciences, specifically within the Sociological Institute (Groningen Centre for Social Science Research). His academic profile shows active research output with publications spanning from 2020 to 2024, indicating his current engagement in computational social science research.

Keijzer's research focuses primarily on computational sociology, with particular emphasis on social media dynamics, opinion formation, and polarization phenomena. His work employs agent-based modeling and computational approaches to examine how online social networks influence cultural isolation and political polarization at both micro and macro levels.

His recent publications demonstrate a consistent research trajectory examining the interplay between algorithmic personalization, social influence, and opinion dynamics in digital environments. The 2024 publication in JASSS represents his most current work on polarization mechanisms in social media.

• Department of Computer and Information Sciences, University of Pennsylvania (Visiting researcher, Feb-May 2020)
• Organizer of the workshop 'Validating models of opinion polarization in the digital era' (2019)
• Presenter at multiple academic conferences on social influence experiments and opinion dynamics

Keijzer has also engaged with public discourse through media contributions, notably providing expert commentary on whether social media causes increased polarization in February 2022, which received attention across multiple platforms including X (formerly Twitter) and Bluesky.