This publication offers a number of strong contributions from senior officers in institutions dealing with Evidence-based policy making. These institutions are national and local governments, UNICEF, the World Bank and the International Development Evaluation Association. It tries to bring together the vision and lessons learned from different stakeholders on the strategic role of monitoring and evaluation in evidence-based policy making. These stakeholders are policy-makers, in their role of users of evidence, and researchers and evaluators, in their role of suppliers of evidence.