Birdsall, Nancy; Lustig, Nora; Meyer, Christian J. - In: World Development 60 (2014) C, pp. 132-146
households with daily income per capita between $4 and $10 (at constant 2005 PPP). This group will account for about a third of … the region’s population over the next decades; as the size and income of the middle class rises, they could become …