@techreport{Henderson2013,
author = {Henderson, J.V. and Roberts, M. and Storeygard, A.},
title= {Is urbanization in sub-Saharan Africa different?},
year = {2013},
doi = {10.1596/1813-9450-6481},
publisher = {World Bank},
address = {Washington, D.C},
institution = {Policy Research Working Papers},
}