Drawing from 1.7 million Gallup surveys collected between 2008 and 2012, researchers Angus Deaton and Arthur Stone found that parents with children at home age fifteen or younger experience more highs, as well as more lows, than those without children... And when researchers bother to ask questions of a more existential nature, they find that parents report greater feelings of meaning and reward -- which to many parents is what the entire shebang is about.