About 3ieThe International Initiative for Impact Evaluation (3ie) is an international grant-making NGO promoting evidence-informed development policies and programmes. We are the global leader in funding and producing high-quality evidence of what works, how, why and at what cost. We believe that better and policy-relevant evidence will make development more effective and improve people's lives. 3ie scoping papers 3ie thematic window grant programmes typically start with a consultative process that includes a scoping study identifying the current state of impact-evaluation evidence in a particular sector. Scoping studies identify the promising questions for research synthesis and the priority questions for further impact-evaluation research. They analyse the existing supply of impact-evaluation and systematic-review evidence as well as the demand for such evidence from policymakers and programme managers. About this scoping paperThis paper provides an assessment of the supply of and demand for evidence on peacebuilding interventions in support of a joint 3ie -Innovations for Poverty Action -World Bank initiative called Evidence for Peacebuilding. The scoping paper is the key output of the stocktaking phase of the initiative, and the final publication reflects consultation that occurred after the draft paper was prepared and presented. All of the content is the sole responsibility of the authors and does not represent the opinions of 3ie, its donors or its Board of Commissioners. Any errors and omissions are also the sole responsibility of the authors. Any comments or queries should be directed to the corresponding author Annette N. Brown at abrown@3ieimpact.org. AcknowledgementsThis paper is part of a joint initiative of 3ie, Innovations for Poverty Action (IPA) and the World Bank. The work for this paper was funded by a contract from the World Bank.The scoping paper is based on three primary inputs: the evidence gap map, the portfolio review and the stakeholder survey. 3ie staff and consultants prepared the evidence gap map under the direction of Drew Cameron and Annette Brown. A separate report on the evidence gap map entitled Evidence for peacebuilding: an evidence gap map serves as a companion piece to this paper and is available as part of 3ie's Evidence Gap Map Report series. We would like to recognise Anjini Mishra, Mario Picon, Hisham Esper, Flor Calvo and Katia Peterson, who coauthored the gap map report.IPA staff prepared the portfolio review under the direction of Faith McCollister. 3ie staff, with IPA assistance, conducted and analysed the stakeholder survey, under the direction of Jennifer Ludwig. Annette Brown provided leadership and management over all inputs and the scoping paper itself.We are grateful to Jane Burke for research assistance.We would like to thank the Alliance for Peacebuilding, United States Institutes for Peace, the World Bank, the United Nations Peacebuilding Fund, and International Rescue Committee for sponsoring and hosting workshops that provided valuable inputs and feedback...