The instant New York Times bestseller! * One of Behavioral Scientist’s Notable Books of 2021“Emily Oster dives into the data on parenting issues, cuts through the clutter, and gives families the bottom line to help them make better decisions.” –Good Morning America“A targeted mini-MBA program designed to help moms and dads establish best practices for day-to-day operations." -The Washington PostFrom the bestselling author of Expecting Better and Cribsheet, the next step in da