Research collaborations:
- APSA, Legislative Studies Section
- ECPR Standing Group on Parliaments
- Inter-Parliamentary Union
- European Parliamentary Research Group (EPRG)
- RECON: Representation and Institutional Make-up
- Deutsche Vereinigung für Parlamentsfragen; Zeitschrift für Parlamentsfragen
- Groupe de recherche sur les Parlements et les Parlementaires (GRPP)

University based research centres:
- Centre for Legislative Studies at University of Hull, U.K.
- The Centre for Legislative Studies at the University of North Carolina, Greenboro
- Institute of Sociology of the Academy of Sciences of the Czech Republic, Prague
- SFB 804 (collaborative research centre 804) "Transzendenz und Gemeinsinn" at the Technical University Dresden
- SFB 580 (collaborative research centre 580) "Discontinuity, Tradition, Structural Formation" at the Friedrich-Schiller-University Jena