This is a very valuable paper by Raquel Fernandez @raquel1fernan, Ines Berniell, @InesBerniell, and Milagros Onofri @milagrosonofri. The paper develops a statistical decomposition to understand how changes in different attitudes are related to changes in desired fertility. The most important factor the paper finds is a decrease in the belief that children are necessary for personal fulfillment. An increase in the perception that children inhibit parental freedom, and a reduction in desired number of children and increases in the perceived compatibility of work and children, which lower ideal fertility. Interesting heterogeneities are explored across educational types. Important facts for understanding demographic trends in high income societies. I think a useful extension of the analysis would be to systematic explore whether the parameters linking attitudes to fertility were allowed to vary. It is not obvious that the relationship between the view that children and work are compatible is independent of cultural variables, or for that matter, the support given to families in terms of leave, etc.