Welcome to my personal homepage! I am Professor for Methods of Comparative Political Research at the Cologne Center for Comparative Politics at the University of Cologne. My research interests are social science methods with an emphasis on causal inference and qualitative and multimethod research. Substantively, I work on political parties and party politics.

Rohlfing – cv – 20-06


Course on Mixed-Methods Research at GESIS Summer School, August 17-21
I am giving a course on Mixed-Methods Research at the GESIS Summer School in Survey Methodology 2020. It will be an online course with asynchronous (recordings) and synchronous elements (live sessions). The live part will cover 24 hours in total over the entire week. Please send me an email or DM me on Twitter if you are interested in taking the course and have questions about it.

R package MMRcaseselection 0.1.0 on CRAN and Github
I have written a package for the choice of cases based on regression results following the spirit of nested analysis. Version 0.1.0 has been released on CRAN. (Github repository).