Is the Happiness Curve Real?

Psychologist says there's good reason to believe the happiness curve is real. He thinks it may be because as you hit that midd life period, your may be under a combination of family stress, ecause parenting is not easy, and work stress. But i think either way, what it says is that the kind of sing happiness that you are predicted to experience in your fifties and her sixties isn't because you are doing better but because you have subjectively changed the targets themselves.