**Emily Oster *is a professor of economics at Brown University and the author of Expecting Better, Cribsheet,and The Family Firm *. She writes the newsletter ParentData and her work has been featured in * The New York Times, The Wall Street Journal, The Washington Post, The Atlantic,and Bloomberg *....

**Emily Oster *is a professor of economics at Brown University and the author of Expecting Better, Cribsheet,and The Family Firm *. She writes the newsletter ParentData and her work has been featured in * The New York Times, The Wall Street Journal, The Washington Post, The Atlantic,and Bloomberg *. She has two children.