Abstract

Most scholars conceive policy integration (PI) as a top-down process steered by governmental bodies and consider the formulation stage to be the decisive step for achieving PI. Adopting a different stance, this article hypothesizes that PI can also occur throughout the implementation stage thanks to “integration entrepreneurs” who are able and willing to bring together policies that were designed in silos. I test this hypothesis by analyzing the evolution of federal legislation intended to curb urban sprawl in Switzerland over four decades (1980–2020) and investigate three major urban renewal projects that concretely reduced urban sprawl in the cities of Zurich, Bern and Geneva. In line with my hypothesis, these urban renewal projects succeeded thanks to an ex post integration of several policies that occurred during the implementation stage. This integrative process was an unintended outcome of the transformation of the Swiss Federal Railways (SBB) from a federal government institution into a state-owned company. Since then, the SBB has become an “integration entrepreneur” who brings together three federal policies that were previously poorly integrated: the spatial planning policy, the railway policy and the agglomeration policy. Case study evidence thus shows that PI can also happen unintentionally, namely through coordination mechanisms that were not foreseen by policymakers at the formulation stage. This finding challenges the top-down sequential approach of the policy process that is dominant among PI studies and calls for more research on the role and the strategies of “integration entrepreneurs” throughout the implementation stage.