Lack of sanitation is a huge development challenge in Kenya, but also a potentially sizeable market opportunity. The World Bank and IFCs ‘Selling Sanitation’ project worked with large plastics manufacturing firms in Nairobi to design, test, and support market development and distribution of a range of plastic latrine slabs. The products were designed from the consu...

To find out why African countries' experience with urbanization and sustained growth appeared to differ from that of other countries, the authors investigated the determinants of urbanization across countries over 40 years. Rather than studying individuals' decisions to migrate, they relied on macroeconomic data and cross-country comparisons. A central hypothesis o...