When we ask people about whether they're glad they had children, we get a lot of different results. And i'm not sure there's anything scientific about that. They're very sensitive to issues like howis the question worded. Some it is just a carelessness in terms of building the survey. Some it may be that we find of ourselves. I think both common sense and empirical data say that having kids, particularly young kids, is rough. It takes away your sleep, it increases marital arguments, it tires you out and so on. The first is bad, the second is good. Children are right in the middle. But i think there's something else which holds true, which