How is urban co-production conveyed in European cities?

Urban co-production, through which citizens contribute with the public institutions to the planning or governance of the city, is a growing practice throughout Europe. However, apart from the more widespread and spontaneous 'co-city' model, only a few countries have adopted state policies of urban co-production. A comparative inquiry of the European spatial governance and planning systems (SGPSs) highlights at least three possible types of correlation between systems and urban co-production. Urban co-production as a state policy appears to take shape only in countries with SGPSs characterized by a greater capacity for public control over spatial development. Moreover, only SGPSs that allocate land rights on a case-by-case basis seem able to ensure that co-production operates within (and not outside) the system itself.