Islamic law and investments in children: Evidence from the Sharia introduction in Nigeria.

Islamic law lays down detailed rules regulating children's upbringing. This study examines the effect of such rules on investments in children by analysing the introduction of Sharia law in northern Nigeria. Triple-differences estimates using temporal, geographical and religious variation together with large, representative survey data show decreases in infant mortality. Official government statistics further confirm improvements in survival. Findings also show that Sharia increased vaccination rates, duration of breastfeeding and prenatal health care. Evidence suggests that Sharia improved survival by specifying strict child protection laws and by formalising children's duty to maintain their parents in old age or in sickness.