Contributor(s): Dr Camille Landais | Dr Landais will examine the latest research into the best ways of determining the optimal level of welfare provision and social insurance in developed economies. Camille Landais is a member of the faculty of the LSE Department of Economics, and an Associate on the Public Economics Programme at STICERD. Wouter Den Haan is Professor of Economics and Co-Director of the Centre for Macroeconomics. The Department of Economics at LSE (@LSEEcon) is one of the largest economics departments in the world. Its size ensures that all areas of economics are strongly represented in both research and teaching. The Centre For Macroeconomics (@CFMUK) brings together world-class experts to carry out pioneering research on the global economic crisis and to help design policies that alleviate it.