The principal aim of this paper is to provide a intuitive introduction to cluster analysis. Methodologically, we use data from Coppedge, Alvarez e Maldonado (2008) regarding the two dimensions of polyarchy proposed by Dahl (1971): contestation and inclusiveness. Based on these dimensions we classify political regimes in different groups (clusters) according to their similarity level. On substantive grounds, we hope to suggest a methodological tool to classify political regimes and facilitate the understanding of cluster analysis in Political Science.
political regimes; cluster analysis; Q analysis; classification; quantitative methods
