How does evidence matter? Understanding 'what works' for wellbeing

In 2015 the UK launched an independent What Works Centre for Wellbeing, co-funded by government departments and various agencies, which aims to develop a ‘strong and credible evidence base’ to help promote wellbeing in policy. Yet while there is widespread agreement that evidence matters in policy-making, it is far from clear what kinds of evidence matters, in what circumstances and to what extent. In this context, this article presents the findings of research exploring with policy-makers and stakeholders issues in the use of evidence in relation to wellbeing in public policy. In particular, it highlights evidence as a specific form of (research-based) knowledge and considers the importance of this relative to other forms of knowledge; political, professional and experiential. This approach highlights a broader understanding of ‘what works’ beyond the relatively technical sense often employed to describe the work of What Works Centres and in the use of evidence more generally.