I have no children, but those studies always seem to focus on parents who are, at that moment, raising small children. They are asked at the most stressful poin

I have no children, but those studies always seem to focus on parents who are, at that moment, raising small children. They are asked at the most stressful point in the process if they are happy, of course they'll say no. These studies need to amortize happiness levels over a number of points in the childs life: birth, a few intervals likke 2/5/10/15, and once the child has moved on and left their house.