I am an Associate Professor at the Department of Political Science at University College London (UCL) and an affiliated faculty member with the Immigration Policy Lab at Stanford University and ETH Zurich. I do research on the role of immigration in politics and quantitative methods.

Recent Papers

  • M. Herpell, M. Marbach, N. Harder, A. Orlova, D. Hangartner, J. Hainmueller The Impact of Private Hosting on the Integration of Ukrainian Refugees in Germany Nature Human Behaviour (2025). [Paper] [Preprint]

  • M. Marbach, E. Vallizadeh, N. Harder, D. Hangartner, J. Hainmueller Does ad hoc language training improve the economic integration of refugees? Evidence from Germany’s response to the Syrian refugee crisis Journal of the Royal Statistical Society Series A: Statistics in Society (2025). [Paper] [Preprint]

  • J. Hainmueller, M. Marbach, D. Hangartner, N. Harder, E. Vallizadeh Refugee Labor Market Integration at Scale: Evidence from Germany's Fast-Track Employment Program IPL Working Paper No. 25-02 (2025). [Preprint]