Having kids makes you happier, but only after they move out, study shows

The Pew Research Center reports that 20 percent of American women are remaining child-free after their childbearing years compared to 10 percent of women in the 1970s. For decades, researchers have investigated whether people are happier with kids or without, and most studies have suggested that having children does not make you happier.  A study led by Christoph Becker at Heidelberg University is shedding new light on this debate, revealing that parents are actually happier than childless adults - but not until after the kids have …