10.34934/DVN/N9NDVL Paulis, Emilien0000-0001-5954-4182(Université du Luxembourg)Pilet, Jean-Benoit0000-0001-5612-0835(Université libre de Bruxelles)Rojon, Sebastien0000-0003-3559-4673(Université libre de Bruxelles)Theuwis, Marie-Isabel0000-0003-1802-7896(Université libre de Bruxelles)Vittori, Davide0000-0002-0161-9679(Université libre de Bruxelles) Social Sciences and Digital Humanities Archive – SODHA 2025 This dataset contains the conjoint survey experimental data on citizens' democratic preferences gathered in 15 EU countries. The survey experiments took place in 2021 within the framework of the POLITICIZE project, which aims to study and understand non-elected politics in contemporary European democracies. Theuwis, Marie-Isabel(Université libre de Bruxelles)