The document discusses the role of the public sector in supporting value chain development initiatives for long-term sustainability and scaling up. It presents a conceptual framework and analyzes case studies of three initiatives - Cocoa Life in Cote d'Ivoire and Ghana, Strengthening the Dairy Value Chain in Bangladesh, and Pathways in India, Tanzania and Malawi. The public sector plays an important role through activities like technical assistance, infrastructure development, research, policy frameworks, and facilitating social development. However, the level of engagement varies across contexts from low in Bangladesh to high in Ghana and Cote d'Ivoire. Decentralization and a bottom-up approach linked to local contexts tend to achieve better social