Hansmeier, HendrikHendrikHansmeierLosacker, SebastianSebastianLosacker2022-03-0613.5.20212021https://publica.fraunhofer.de/handle/publica/26731110.24406/publica-r-26731110.1080/13673882.2021.00001088We argue that the combination of place-based supply-side and demand-side innovation policies is particularly important for environmental innovations. Beyond that, we call attention to the double externality problem of environmental innovations, which requires (region-specific) policy support in the diffusion phase. Finally, we posit that the successful combination of region-specific supply and demand-side eco-innovation policies can create regional lead markets and help to leverage sustainability transitions.enSustainability transitionsRegionInnovation policyEnvironmental innovation303600journal article