This paper discusses the concept of Europeanization in the light of recent research on the impact of the European Union politics and policy. Conceptual analysis is preliminary to empirical analysis. Accordingly, I examine the risk of concept stretching , discuss extension and intension of Europeanization, and propose a taxonomy to unpack the concept and organize empirical research. The explanation of Europeanization is based on mechanisms and variables that need further exploration, but some preliminary results are presented here. Further research should concentrate on the policy level (and its interaction with macro-structures) and seek cross-fertilization with theoretical policy analysis and international relations, thus avoiding the risk of intellectual segregation.