On The Gist, how much sanity does it cost to change a lightbulb?

In the interview, babies don't come with instructional manuals, but the publishing industry is more than ready to bombard new parents with the latest, always evolving wisdom on how to raise a human right. But Emily Oster's new book is a rare scientific look at child-rearing, grounded in her expertise as a rational economist and her experience as an anxious mother. Oster is the author of Cribsheet: A Data-Driven Guide to Better, More Relaxed Parenting, from Birth to Preschool.

In the Spiel, president Trump's directionless foreign policy is on full display against Iran.

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