The national impact of European Union regulatory policy: Three Europeanization mechanisms

. While much has been written about the impact of European Union (EU) regulatory policy, most of the scholarly work is concerned with developments at the European level. Only recently have attempts been made to fill this gap. Although there is a growing number of studies explicitly concerned with the Europeanization of domestic institutions, we still lack consistent and systematic concepts to account for the varying patterns of institutional adjustment across countries and policy sectors. The aim of this article is to provide a more comprehensive framework for explaining the domestic impact of European policy making. We make an analytical distinction between three mechanisms of Europeanization – institutional compliance, changing domestic opportunity structures, and framing domestic beliefs and expectations – each of which requires a distinctive approach in order to explain its domestic impact. We argue that it is the particular type of Europeanization mechanism involved rather than the policy area itself that is the most important factor to be considered when investigating the domestic impact of varying European policies.