Hybrid launch of new OECD report and high-level panel discussion Public acceptability is an essential condition for the successful implementation of reforms. The importance of understanding the “demand-side” of reform and the conditions that contribute to building broad public support has long been recognised by the OECD and confirmed by the evidence, most notably in the landmark 2010 report Making Reform Happen. This importance has only grown in the past 15 years. Ambitious reform agendas are needed to navigate the profound changes brought about by the demographic, digital and green transitions. Furthermore, citizens increasingly demand the right to participate in the policymaking process and in several key areas policy preferences have become more difficult to explain based on socio-economic characteristics alone. The development of perceptual and behavioural data has provided a growing body of evidence on the public perceptions, attitudes and preferences that constitute the “demand-side” of reform. As demonstrated by the 2021 OECD report Does Inequality Matter?, valuable new insights on public acceptability can be drawn from these data and used to improve policies by complementing conventional statistical indicators. This latest report, Getting the Public on Side: How to Make Reforms Acceptable by Design, contributes to both of these strands of OECD work. Taking stock of recent methodological advances and building on the findings of the interdisciplinary OECD Expert Group on New Measures of the Public Acceptability of Reforms, it looks at (i) the analytical frameworks that are used to interpret the available perceptual and behavioural data and how effective they are in drawing relevant insights for policy; and (ii) the policy tools that can help integrate these insights into the reform process. The aim in doing so is to improve policy advice by taking better account of public acceptability and facilitate the successful implementation of needed reforms. This event presented the main results from the report. It also brought together policymakers, representatives from international organisations and foundations to discuss key challenges relating to the public acceptability of reforms, notably in the context of the Green Transition.