10.7910/DVN/NKE1IHMcDonnell, DuncanDuncanMcDonnell0000-0002-0319-3747Griffith UniversityAmmassari, SofiaSofiaAmmassari0000-0002-6788-8791Griffith UniversityVALBRUZZI, MARCOMARCOVALBRUZZI0000-0002-8019-1024Università degli Studi di Napoli Federico IIBolin, NiklasNiklasBolin0000-0002-2597-363XMid Sweden UniversityWerner, AnnikaAnnikaWerner0000-0001-7341-0551University of SouthamptonHeinisch, ReinhardReinhardHeinisch0000-0002-0019-2423University of SalzburgJungar, Ann-CathrineAnn-CathrineJungar0000-0002-7203-9495Södertörn UniversityWegscheider, CarstenCarstenWegscheider0000-0002-5425-7595University of MünsterHarvard Dataverse2026Social SciencesAmmassari, SofiaSofiaAmmassariGriffith University2026-02-032026-02-0510.1177/135406882413103493745419658444903014455948228851266146265308259823446723044539584453826320291494529application/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/vnd.openxmlformats-officedocument.spreadsheetml.sheet1.0CC0 1.0This dataset contains the full Youth Wing Membership Survey (YOUMEM) - the largest comparative survey of political party youth wing members to date. It includes responses from over 5,000 members of 12 centre-left and centre-right youth wings in six countries (Australia, Austria, Germany, Italy, Spain and Sweden). The dataset covers members' biographies, reasons for joining the youth wing and reasons for staying in it.