"One or two hybrid days per week capture nearly all the fertility upside." That is an interesting point, and not obvious why it would be so. In fact, it kind of calls into question whether the whole relationship is causal. The people who were able to WFH longer were more often in high-income jobs (service workers never got to do it in the first place, it was almost entirely an office worker thing). They were thus mor…
two working people, trapped in the same house together during working hours.
if there are kids, they might be at school.