Research from the United States shows that gaps in early cognitive and non-cognitive ability appear early in the life cycle. Little is known about this important question for developing countries. This paper provides new evidence of sharp differences in cognitive development by socioeconomic...

This paper shows that there are large differences in cognitive and socio-emotional development between children from rich and poor backgrounds at the age of 3, and that this gap widens by the age of 5. Children from poor backgrounds also face much less advantageous "early childhood caring...

While the ratio of the younger to older populations grows smaller, the population of the old with health problems is increasingly growing. The likelihood of being disabled is higher for an individual with a lower socioeconomic status than that of an individual with a higher socioeconomic status....