Changing European Welfare States and the Evolution of Migrant Incorporation Regimes outlines key features of the social welfare regimes of the four countries in the IMPACIM (The Impact of Restrictions and Entitlements on the Integration of Family Migrants) project, providing insights into the contexts through which migrants’ entitlement to, or exclusion from, key welfare state provisions can be explained. It provides insight into the core features and cross-national differences in the countries' welfare states structures, including analysis of the basis of welfare funding, actors in provision, the basis of entitlements and their historical development. It also provides a broad overview of migrants' social rights within a wider analysis of the urgent and necessary processes of reform that European welfare states must tackle.