TIME

Emily Oster

The economist and author of the modern pregnancy bible Expecting Better on her new book about data-driven parenting in the early years, Cribsheet

An economist isn’t the first person you’d expect to get parenting advice from. How did you decide to apply that framework to this subject? I got pregnant. I started using a lot of the decision-making and data-analysis tools I use in my job to make choices about my pregnancy and then my parenting.

When you were deciding what to cover in Cribsheet, did parents

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