The World Bank has been tracking the world's progress against poverty since the late eighties, but the release of 2008 data was the first time in which all regions of the developing world showed a decline in the number of people living below poverty lines!
The youth bulge is a common phenomenon in many developing countries, and in particular, in the least developed countries. It is often due to a stage of development where a country achieves success in reducing infant mortality but mothers still have a high fertility rate. The result is that a large share of the population is comprised of children and young adults, and today’s children are tomorrow’s young adults.
Figures 1 (a)-(b) provide some illustrative examples. Dividing the world into more and less developed groupings (by UN definitions) reveals a large difference in the age distribution of the population. The share of the population in the 15 to 29 age bracket is about 7 percentage points higher for the less developed world than the more developed regions. In Africa (both Sub-Saharan and North Africa), we see that about 40 percent of the population is under 15, and nearly 70 percent is under 30 (Figure 1(a)). In a decade, Africa’s share of the population between 15 and 29 years of age may reach 28 percent of its population. In some countries in “fragile situations” (by World Bank definitions), almost three-quarters of the population is under 30 (examples in Figure 1(b)), and a large share of 15-29 year olds will persist for decades to come (Figures 1(c) and (d)).