Party system nationalisation in Sub-Saharan Africa: Empirical evidence and an explanatory model

This article draws on a sample of recent legislative elections held in 43 countries of Sub-Saharan Africa in order to empirically estimate and explain the levels of party system nationalisation. The analysis demonstrates that the overall level of party system nationalisation in Africa is relatively low, but in this respect, Africa displays little difference from other developing regions of the eastern hemisphere. Within the set of explanatory variables, an important role is played by ethno-linguistic fractionalisation. However, the explanatory power of this factor is rather limited. A model of party system nationalisation, including electoral system effects, party system fragmentation and political regime characteristics, such as authoritarianism and presidentialism, is proposed and empirically validated. The model demonstrates that while the joint impact of the identified explanatory factors is strong and consistent, none of them can be singled out as the crucial determinant of party system nationalisation in Sub-Saharan Africa.