“…Furthermore, studies that perform a cross-national comparison are typically based on aggregate data, and as a result, compositional differences between countries -in terms of for instance education or wealth -are not taken into account (Aleksynska & Algan, 2010;Janoski, 2010;Reichel, 2011). Limited individual-level research on the impact of institutional conditions shows that policy indeed matters in the European context, as more restrictive citizenship policies deter citizenship acquisition (Dronkers & Vink, 2012;Vink et al, 2013;Reichel & Perchinig, 2015). However, these studies are based on cross-sectional data, and a deeper understanding of the relevance of policy requires a longitudinal analysis of citizenship acquisition under transforming institutional conditions.…”