BACKGROUNDFostering, raising children that are not one's biological children, is common in many societies worldwide. Despite predicted lower investment in nonbiological offspring, numerous studies report no obvious well-being penalty for fostered children. Building on prior research, we suggest that fostering is incentivised by close relatedness between foster child and caregivers and that children's work contributions can offset their costs to fostering households.
METHODWe used multilevel logistic and fractional multinomial regression analyses to investigate the association between fostering, educational investment, and time allocation in a sample of 1,273 Sukuma children (aged 7-19) from northwestern Tanzania, where fostering is traditionally common.
RESULTSTwenty-six per cent of children are fostered, with most having at least one living parent. Children fostered by close kin have similar educational outcomes to those living with both biological parents, though their grade for age is lower, perhaps reflecting differences in timing rather than overall level of investment. Those fostered by distant kin are less likely to be enrolled or to progress to secondary school. Overall, fostered children are more likely to do farm work; however on weekdays when work conflicts