The document discusses two paradigms of cooperation in transboundary river basins: water-sharing and benefit-sharing. It analyzes how these paradigms have been applied in the Nile River Basin by the Nile Basin Initiative, noting technical and conceptual challenges. Specifically, benefit-sharing has not led to concrete outputs or clear principles for sharing benefits and costs. The document argues that benefit-sharing should be implemented complementarily with water-sharing and through specific joint development projects to help move cooperation forward in the Nile Basin.