“…Based on evidence primarily from parties in Western Europe, four types of factors have been proposed to explain multi-level party organization: (1) systemic features such as the type of federalism, electoral rules and laws; (2) the nature of statewide and regional party competition, especially the degree to which the party system is nationalized, which in turn can be related to the structure of underlying sociological cleavages; (3) political factors such as the incumbency status of the statewide and regional branches; and finally, 4internal party features such as the institutionalization of the party's organization, party ideology, the presence of powerful figures at the regional level and the party's general attitude towards decentralization of power, both within the party organization and within the state (DETTERBECK and RENZSCH, 2003;DESCHOUWER, 2003;FABRE, 2008a;HOPKIN, 2003;SCHARPF, 1995;SWENDEN and MADDENS, 2009a;THORLAKSON, 2009).…”