The electoral fate of ethnoregionalist parties in Western Europe: A boolean test of extant explanations

In this study I argue that we need to rethink some theoretical and empirical considerations related to our understanding of ethnoregionalist (ETR) parties in Western Europe. Research has stressed the strong impact of structural attributes of political systems, mostly electoral systems with proportional representation (PR), on the electoral success of ETR parties. From applying Boolean analysis to compare 12 ETR parties with varied levels of electoral success, it is claimed that the emphasis on type of electoral system as the determinant factor present in the relevant literature on small and regional parties is unjustified and that the presence of a distinctive local language, understood as a facilitating factor to translate regional demands and protest into political influence, is the most critical variable to avoid electoral failure. Moreover, most causal factors are linked through a structure of 'elective affinity' (social and political determinants as lying in closely related bundles) according to the specificity of ethnoregionalist politics. This finding not only sheds light on the fate of ETR parties but may also apply to other ideologically eclectic political parties.