Rojas-Serrano et al. aim to provide a clear and widely accepted definition of a sustainable circular bioeconomy. The adoption of this concept can significantly contribute to the achievement of sustainable development goals related to responsible consumption and production, industry, innovation and infrastructure, poverty reduction, social equity and environmental protection. The effects of Covid-19 crisis in Tunisia are faced by Hammoudi et al. with particular focus on the role of the informal economy in the structuring of agricultural value chains. The authors highlight the dilemmas that public authorities may face in their strategy for regulating informality. The paper gives recommendations for the gradual integration of the informal economy into the formal system based on both reducing incentives for the informal sector and strengthening the capacities of formal stakeholders to reduce their dependence on the informal sector.
