Harvard Business School Professor Kathleen McGinn hopes the findings bring a big sigh of relief for guilt-ridden mothers who either have to hold down a job to make ends meet or simply choose to work outside the home while raising their children. “People still have this belief that when moms are employed, it’s somehow detrimental to their children. Our finding that maternal employment doesn’t affect kids’ happiness in adulthood is really important.” Less guilt, more upside.