The tariffs President Trump unveiled this week were both bigger than most people expected and a lot more confusing. These aren’t the flat tariffs he proposed during the campaign. And they aren’t reciprocal tariffs, as he claimed in his Rose Garden speech. So what is Trump actually doing here?

I knew my former colleague Paul Krugman would have some thoughts. Krugman is a Nobel laureate trade economist who was a New York Times Opinion columnist for 25 years. He now writes an excellent newsletter on Substack, where he’s been trying to make sense of the theories behind Trump’s tariff policies and, now, their strange reality.

Mentioned:

“Stop Looking for Methods in the Madness” by Paul Krugman

Book Recommendations:

The Price of Peace by Zachary D. Carter

How Not to Invest by Barry Ritholtz

War and Power by Phillips Payson O’Brien

Thoughts? Guest suggestions? Email us at ezrakleinshow@nytimes.com.

You can find transcripts (posted midday) and more episodes of “The Ezra Klein Show” at nytimes.com/ezra-klein-podcast. Book recommendations from all our guests are listed at https://www.nytimes.com/article/ezra-klein-show-book-recs.

This episode of “The Ezra Klein Show” was produced by Rollin Hu. Fact-checking by Michelle Harris, with Kate Sinclair and Mary Marge Locker. Mixing by Efim Shapiro and Aman Sahota. Our executive producer is Claire Gordon. The show’s production team also includes Elias Isquith, Kristin Lin and Jack McCordick. Original music by Pat McCusker. Audience strategy by Kristina Samulewski and Shannon Busta. The director of New York Times Opinion Audio is Annie-Rose Strasser.

Unlock full access to New York Times podcasts and explore everything from politics to pop culture. Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify.