10.34934/DVN/OTAEBW Pilet, Jean-Benoit0000-0001-5612-0835(Université libre de Bruxelles (ULB))Renwick, Alan(University College London) Social Sciences and Digital Humanities Archive – SODHA 2024 Dataset of electoral systems for lower chamber of parliament in 31 European democracies (EU27, CH, NOR, UK, ISL) between 1945 and 2020 Pilet, Jean-Benoit(Université libre de Bruxelles (ULB))Pilet, Jean-Benoit(Université libre de Bruxelles (ULB))