Also, revealed preferences reveal very little in this case, because:
(a) even if you don’t want kids, you might prefer to make that choice for yourself
(b) some well-off people do choose to have kids
(c) almost nobody is so well-off that having kids would entail a relatively small financial sacrifice, in part because well-off people are expected to (and do) spend more money on their kids
This colleague of Robin Hanson thinks it’s pretty great.
Also, revealed preferences reveal very little in this case, because:
(a) even if you don’t want kids, you might prefer to make that choice for yourself
(b) some well-off people do choose to have kids
(c) almost nobody is so well-off that having kids would entail a relatively small financial sacrifice, in part because well-off people are expected to (and do) spend more money on their kids