This dataset identifies and lists all the new parties emerged in Western Europe since 1945 and provides data about party system innovation, defined as the aggregate level of ‘newness’ recorded in a party system at a given election. Data are based on parliamentary elections (lower house) in 20 Western European countries since 1945. This dataset covers the entire universe of Western European elections held after World War II under democratic regimes. Data for Greece, Portugal and Spain have been collected after their democratizations in the 1970s.
This dataset will be regularly updated so as to include latest elections.
How to cite this dataset?
Emanuele, V. (2016), Dataset of New Parties and Party System Innovation in Western Europe since 1945, Rome: Italian Center for Electoral Studies, http://dx.doi.org/10.7802/1363.
Publications based on this dataset
Emanuele, V. and Chiaramonte, A. (2018), ‘A growing impact of new parties: myth or reality? Party system innovation in Western Europe after 1945’, Party Politics, 24(5), 475-487.
Emanuele, V. and Chiaramonte, A. (2019), ‘Explaining the impact of new parties in the Western European party systems’, Journal of Elections, Public Opinion and Parties, 29(4), 490-510.
Emanuele, V. and Sikk, A. (2021), ‘Party crashers? Modeling genuinely new party development paths in Western Europe’, Party Politics, 27(5), 883-895.
Chiaramonte, A. and Emanuele, V. (2022), The deinstitutionalization of Western European party systems, London: Palgrave Macmillan.
Dataset of New Parties and Party System Innovation in Western Europe since 1945 (updated on October 3, 2022)