Rafal Riedel is Professor of European integration studies and Head of the Department of Political and Administrative Systems at Opole University, Poland. He has held numerous positions in Norway, Switzerland, Germany, and Austria. Jakub Anusik is a PhD researcher and teaching assistant at the University of Lodz, Poland. He is involved in the research project "The Determinants and Dynamics of Differentiated Integration in Post-Brexit Europe" and has published on European integration and comparative capitalism.