Comparative European Party Systems, Second Edition, provides a comprehensive analysis across 48 party systems of party competition, electoral systems and their effects, and the classification of party systems and governments from 1945 through late-2018. The book consists of three parts. Part I provides a comparative and quantitative overview of party systems according to party families, patterns of party competition, electoral systems and their effects, and classification of party systems and governments. Part II consists of 38 detailed country profiles of longstanding democracies and of the European Union (plus nine profiles on regions such as in Spain and the UK), providing essential detail on the electoral systems, parties, party patterns and systems, dimensions of political competition, and governments. Part III provides an analysis of 10 additional country profiles of oscillating regimes such as Russia, Ukraine, and Balkan and Transcaucasus states. Comparative European Party Systems provides an excellent overview of topical issues in comparative election and party system research and presents a wealth of information and quantitative data. It is a crucial reference for scholars and students of European and comparative politics, elections, electoral systems, and parties and party systems.