Temporal dynamics of interactions in European Administrative Networks: The case of SOLVIT

This article provides an analysis of the temporal development of interactions within SOLVIT, the European Union's problem-solving internal market network. Adopting an agency-based, rationalist approach, we hypothesize that temporal development depends on cross-border interdependence, institutional homogeneity, SOLVIT centre caseload and Brexit. Testing these hypotheses, we control for members’ resources, perceptions of SOLVIT and endogenous network dynamics. The ensuing model is tested using stochastic actor-oriented models on interactions in 2011 and 2018, thus yielding a panel-data analysis. Our main finding is that SOLVIT interactions are remarkably stable over time. This is mostly due to the strong effect of interdependence, which is rather constant over time. Strikingly, we find no effect for institutional homogeneity, case load and Brexit. In sum, our analysis reveals that European Administrative Networks can develop into stable patterns of interactions, driven by rather structural features of interdependence.