Emily Oster is a writer and a thinker after our own heart. Frustrated with all the bad parenting advice\u2014most of which seems to be based on old wives\u2019 tales and ridiculously bad data\u2014she set out to apply her economist training to the subject of parenting. What kind of sleep training is best? Formula or breastfeeding? Screen time, good or bad?The result was her book Cribsheet: A Data-Driven Guide to Better, More Relaxed Parenting from Birth to Preschool, which is worth reading and recom...