David McDaid is Associate Professorial Research Fellow in Health Policy and Health Economics at the Care Policy and Evaluation Centre, Department of Health Policy at the London School of Economics and Political Science. The primary focus of his work is on using economic arguments to support investment in mental health and wellbeing promotion, self-harm, suicide and mental illness prevention within and beyond the health sector. With more than 25 years of research experience and over 350 publications he has advised many national governments and international agencies. This has included work to assess intersectoral actions to promote health and wellbeing for the World Health Organization as well as reviewing mental health promotion and prevention policy and actions for the OECD. He was an advisor on mental health reform for the Office of Finnish Prime Minister and has delivered numerous international keynote lectures on health economics, mental and public health policy issues. He has been coordinator of the Mental Health Economics European Network, a member of the UK National Institute for Health and Care Excellence’s (NICE) Public Health Interventions Advisory Committee since 2007 and in February 2018 appeared before the UK Parliament’s Science and Technology Select Committee to give expert evidence on the economic impacts of childhood adversity and poor wellbeing.