RT Journal Article SR Electronic T1 The Long-Run Effects of Cesarean Sections JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 2048 OP 2085 DO 10.3368/jhr.58.2.0719-10334R1 VO 57 IS 6 A1 Costa-Ramón, Ana A1 Kortelainen, Mika A1 Rodríguez-González, Ana A1 Sääksvuori, Lauri YR 2022 UL http://jhr.uwpress.org/content/57/6/2048.abstract AB We analyze the long-term effects of potentially avoidable cesarean sections on children’s health. Using Finnish administrative data, we document that physicians perform more unplanned C-sections during their regular working hours on days that precede a weekend or public holiday and use this exogenous variation as an instrument for C-sections. We supplement our instrumental variables results with a differences-in-differences estimation strategy that exploits variation in birth mode within sibling pairs and across families. Our results suggest that avoidable, unplanned C-sections increase the risk of asthma, but do not affect other immune-mediated disorders previously associated with C-sections.