1 Rethinking party-based Euroscepticism: A refined typology Sofia Vasilopoulou PhD Candidate European Institute London School of Economics DRAFT – please do not quote without the permission of the author. Abstract This article aims to make both a conceptual and an empirical contribution to the study of party- based Euroscepticism. First, while critically evaluating current definitions, it puts forward a novel typology of Euroscepticism based on three indicators, namely the principle, the practice and the future of European integration. The typology presented identifies three types of party-based Euroscepticism, including rejecting, conditional and compromising. Concrete distinctions between these three categories are identified to ensure mutual exclusiveness. Second, it conducts a medium- N comparative party manifesto research of radical right parties elected in the European Parliament for the period 2004-2009 demonstrating qualitative differences within a party family otherwise thought to be consistent in terms of its opposition to European integration. Keywords: typological construction, extremist parties, Europe.