Second, Lomborg’s 2024 paper finds evidence that women time their births to just before a wage growth plateau. The evidence it gives again comes from IVF failures. Women who were planning to have a birth, but never succeed, have much flatter wage growth after their planned birth year, even though they didn’t actually have any kids. So the divergence between childrearing mothers and non-childbearing mothers shows up even in this placebo case when neither group actually had kids. Therefore, the event study is overstating the earnings impact of childbirth.
Couldn’t it also be that the women in question plan their career based on the expectation to have children and this is what leads to the plateau? In that case it seems like it would be incorrect to interpret these results as evidence against a child penalty, as it’s merely that the child penalty affects women regardless of whether they have the children. To check, I think you should ask the study participants why their career plateaued then.
Yes, that was my first guess as well. Increased income from employment is most strongly associated with major changes, such as promotion to a new position with changed (and usually increased) responsibilities, or leaving one job and starting work somewhere else that pays more.
It seems plausible that these are not the sorts of changes that women are likely to seek out at the same rate when planning to devote a lot of time in the very near future to being a first-time parent. Some may, but all? Seems unlikely. Men seem more likely to continue to pursue such opportunities at a similar rate due to gender differences in child-rearing roles.
Couldn’t it also be that the women in question plan their career based on the expectation to have children and this is what leads to the plateau? In that case it seems like it would be incorrect to interpret these results as evidence against a child penalty, as it’s merely that the child penalty affects women regardless of whether they have the children. To check, I think you should ask the study participants why their career plateaued then.
Yes, that was my first guess as well. Increased income from employment is most strongly associated with major changes, such as promotion to a new position with changed (and usually increased) responsibilities, or leaving one job and starting work somewhere else that pays more.
It seems plausible that these are not the sorts of changes that women are likely to seek out at the same rate when planning to devote a lot of time in the very near future to being a first-time parent. Some may, but all? Seems unlikely. Men seem more likely to continue to pursue such opportunities at a similar rate due to gender differences in child-rearing roles.