Abstract
This article focuses on the development and use of indicators for subnational comparative policy analysis. Taking migrant integration as an exemplary case, it offers a comprehensive and critical examination of the research process involved in creating and implementing indicators to compare policies at the subnational level. At the intersection of subnational comparative policy analysis and migration research, this article discusses the main methodological and empirical challenges to this process based on the experience of a comparative research project on measuring regional governance of migrant integration in 25 regions across 7 European countries.