In recent years, payment systems have benefited from technological developments that have accelerated their evolution and adaptation to user needs. Payment systems ultimately depend on central bank money, and the debate about the advisability of updating the different ways of representing this...

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...