Paper by Peter Nijkamp et al: “Climate change, energy transition needs and the current energy crisis have prompted cities to implement far-reaching changes in public energy supply. The present paper seeks to map out the conditions for sustainable energy provision and use, with a particular view to the role of citizens in a quadruple helix context. Citizen participation is often seen as a sine qua non for a successful local or district energy policy in an urban area but needs due scientific and digital support based on evidence-based knowledge (using proper user-oriented techniques such as Q-analysis). The paper sets out to explore the citizen engagement and knowledge base for drastic energy transitions in the city based on the newly developed “diabolo” model, in which in particular digital tools (e.g., dashboards, digital twins) are proposed as useful tools for the interface between citizens and municipal policy. The approach adopted in this paper is empirically illustrated for local energy policy in the city of Rotterdam…(More)”.