In 2019 the Nobel prize for economics went to three economists who have promoted the use and importance of Randomised Control Trials (RCTs) in development economics and interventions. But how useful are RCTs in the real world of development assistance? And what more generally needs to be done to improve the quality and impact of impact evaluations, and to promote learning in aid? Panellists: The Hon Dr Andrew Leigh MP, Member for Fenner, ACT Dr Lant Pritchett, Research Director, RISE Programme; Fellow, Blavatnik School of Government, Oxford University Dr Jyotsna Puri, Head, Independent Evaluation Unit, Green Climate Fund Professor Stephen Howes, Director, Development Policy Centre, ANU (Chair)