A new version of the CSES (Comparative Study of Electoral Systems) is now available at GESIS Data Archive for the Social Sciences. For Advance Release 4, nine country studies were added to the fourth Module of the CSES: Finland (2015), Great Britain (2015), Hong Kong (2012), Kenya (2013), New Zealand (2014), Philippines (2016), Romania (2012), Slovakia (2016) and South Africa (2014).Further information is available in our data catalogue.