“…Scholars in various fields, including economics, sociology, demography, medical sciences, and psychology, investigate the later-life effects of birth order. Although there is no conclusive consensus in this field, they generally find that later-born children, on average, have adverse later-life health outcomes, intelligence, cognitive development, IQ, education, and earning (Bertoni and Brunello, 2016;Black et al, 2011;Jayachandran and Pande, 2017;Malak et al, 2019;Pfouts, 1980;Spears et al, 2019). 2 In addition, there is also evidence that a child's birth order is associated with risks of neonatal and infant mortality (Cabrera, 2011;Coffey and Spears, 2021;Cohen, 1975;Miller et al, 1992).…”