A full overview of all publications can be found here. Beyers, J., D. Fink-Hafner, W. Maloney, M. Novak, and F. Heylen (2020) The Comparative Interest Group-survey project: design, practical lessons, and datasets. Interest Groups & Advocacy DOI: 10.1057/s41309-020-00082-0. Heylen, F., E. Willems, and J. Beyers (2020) Do Professionals Take Over? Professionalisation and Membership Influence in