| Since 2012 | Member of the Editorial Board of "Legislative Studies Quarterly". |
| Since 2011 | Evaluator of the European Research Council (ERC). |
| Evaluator of the French National Research Agency (ANR). | |
| Evaluator of the Social Sciences and Humanities Research Council of Canada (SSHRC). | |
| Evaluator of the Swiss National Science Foundation (SNF). | |
| Since 2007 | Member of the Editorial Board of "Political Analysis". |
| Member of the Editorial Board of "International Interactions". | |
| Since 2004 | Evaluator of the Exchange Program of the German Academic Exchange Foundation (DAAD). |
| Since 1999 | Member of the Editorial Board of "Political Studies". |
| Evaluator of the Research Program of the European Commission. | |
| Since 1998 | Member of the Editorial Boards of "European Union Politics". |
| 1996 - 1999 | Co-Editor of the Mannheim Yearbook for European Social Research. |