Contributor(s): Lord O'Donnell | Join Gus O'Donnell and Paul Dolan in conversation, as they discuss the role of happiness in public policy. Gus O'Donnell (@Gus_ODonnell) was Cabinet Secretary and Head of the British Civil Service from 2005-2011 and is currently Chairman of Frontier Economics. Paul Dolan (@profpauldolan) is Professor of Behavioural Science at the London School of Economics and Political Science. He is author of the Sunday Times best-selling book Happiness by Design, and Happy Ever After. The Department of Psychological & Behavioural Science (@LSE_PBS) is a growing community of researchers, intellectuals, and students who investigate the human mind and behaviour in a societal context. Our department conducts cutting-edge psychological and behavioural research that is both based in and applied to the real world. Twitter Hashtag for this event: #LSEHappiness