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.
Published: “Clarifying the relationship between theories of causation and social science methods for causal inference”
The article is co-authored with Christina Zuber and advance access Sociological Methods & Research. [accepted preprint; replication material]
Updated working paper on relationship between crisp ses, fuzzy sets and consistency in QCA
I have written a working paper on the relationship between the choice of crisp and fuzzy sets and the consequences for finding a consistent set relation. Contrary to a commonly held view (I think it is a commonly held view), consistency values are not necessarily more conservative for fuzzy sets than crisp sets.