Dr Tim Leunig (Department of Economic History, London School of Economics) provides a summary of his presentation at the 'Research on Urban Mass Housing' workshop, CSAE, 2012. The Research on Urban Mass Housing workshop ( http://www.oxiged.ox.ac.uk/index.php/events/urban-mass-housing was held by CSAE ( http://www.csae.ox.ac.uk/ ) at St Catherine's College, Oxford, 26/27 March 2012. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/