eu25games2019: A cleaned three-wave EU elections survey (2019) across 25 countries

A harmonized, individual-level dataset from a three-wave survey fielded across 25 EU member states around the 2019 European Parliament elections, including an embedded conjoint experiment, together with the full from-scratch data-cleaning pipeline used to produce it. Party-name variables are linked to Party Facts. The underlying survey data were designed and collected by Hyeonho Hahm, David Hilpert, and Thomas König for their study of partyism and coalition partnership in Europe (American Political Science Review, 2024; doi:10.1017/S0003055423000266). This record reprocesses and extends those data with a documented, reproducible cleaning pipeline. Licensing: the cleaning-pipeline code (notebooks and scripts outside data/) is released under the MIT License; all data files under data/ are released under CC BY 4.0. See the repository LICENSE file and DATA NOTICE for details, including re-identification and ethical-use conditions.