For U.S. Parents, a Troubling Happiness Gap –

Policies that made it less stressful and less costly to combine child rearing with paid work “seem to be the ones that really matter.”

Those same two policies, she said, were also correlated with increased happiness among nonparents. That more paid sick leave and vacation time would make nonparents happier was no surprise, but “we were a little puzzled that lower child care costs would show an effect on nonparents,” Dr. Glass said. She and her colleagues speculate that the result is what economists call an indirect benefit: Everyone is better off when countries invest in the future of their labor force, and everyone suffers when they don’t.