Freshwater resources contribute to agriculture, electricity production, and industrial economic growth around the world. In a new study, DCRP’s Dale Whittington and co-authors discuss how coordinated, collaborative management of the Ethiopian Grand Renaissance Dam (GERD) can enable more efficient use of freshwater resources of the Nile River. The authors couple a computable general equilibrium model of the Egyptian economy with a river basin simulation model to understand the interactions between hydrology and economics. Their findings show how Egypt, Sudan, and Ethiopia can improve their economic outcomes and more efficiently use freshwater resources by flexible coordinating the operation of the GERD. They call this flexible operation policy “neighbors helping neighbors.”