One of the reasons behind this patchy evidence base is the complexity of researching such a wide variety of mechanisms and expected outcomes within different organisational and professional settings. In this research seminar international expert Professor Bert Vrijhoef will share his experience of undertaking such research – the methods that work and the pitfalls to avoid. The seminar is being held on 14 September 2016 at the Jerry Morris Room, London School of Hygiene and Tropical Medicine, 15-17 Tavistock Place, London WC1H 9SH, from 5 pm until 6.30 pm. It is being chaired by Professor Judith Smith, from the Health Services Management Centre at the University of Birmingham. It will be closed by Professor Nick Mays from the Policy Innovation Research Unit, London School of Hygiene and Tropical Medicine.