This brief is the executive summary of the Capitalisation of Experience (Capex) study, which draws lessons learned from over 10 years of MRLG’s policy and practice engagement in the Mekong region. The project has employed multistakeholder approaches, supported alliances of reform actors and used evidence-based analysis to inform policymaking while adapting to the political economy at both national and regional levels. The report distils lessons from five interlinked strategies that defined MRLG’s work : working with alliances for policy influence ; constructive government engagement ; evidence-informed advocacy ; taking a regional approach ; and institutionalising adaptive programming.