Introduction: drawing lessons from international policy-transfer initiatives in regional and urban development and spatial planning

The collection of papers in this issue brings new insights to the processes of international policy transfer and learning in the fields of regional and urban development policy, regional innovation and transit-oriented development. It explores, through the perspective of different disciplines, the motivations of actors, tangible and non-tangible outputs, the role of factors affecting the process, and the spillover effects of such process. The contributions bring new insights into what represents success and failure in policy transfer and provide valuable lessons for policy-makers facing the challenges of a fast-changing global context.