“Revisiting the J-Shape: Human Development & Fertility”--New findings from this H Schubert @cdudel.bsky.social M Kolobova & M Myrskyla study “support the Myrskyla et al. reversal hypothesis for the U.S. at the subnational level when applied to historical periods.”
https://read.dukeupress.edu/demography/article/doi/10.1215/00703370-11680156/393035/Revisiting-the-J-Shape-Human-Development-and