Aside from comparing sub-national geographical units, researchers has also compared exemplars of certain organizational categories with each other. For example, sub-national government and their approaches to ferent types of party (as with, for example, Herbert Kitschelt’s work ‘ecological’ and ‘radical right’ parties) (Kitschelt 1989; Kitschelt McGann 1995). And by examining different national party systems (Lipset and Rokkan’s work (1967) on social cleavages). Different type forms of organization (Rainey and Bozeman, 2000).