Hotel guests adore those cute little soaps, but is it just a one-night stand? In our fourth episode of "The Economics of Everyday Things," Zachary Crockett discovers what happens to those soaps when we love ’em and leave ’em.

The Economics of Everyday Things: Used Hotel Soaps

Freakonomics co-author Stephen J. Dubner uncovers the hidden side of everything. Why is it safer to fly in an airplane than drive a car? How do we decide whom to marry? Why is the media so full of bad news? Also: things you never knew you wanted to know about wolves, bananas, pollution, search engines, and the quirks of human behavior.

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Documentary

Justin Trudeau, facing record-low approval numbers, is doubling down on his progressive agenda. But he is so upbeat (and Canada-polite) that it’s easy to miss just how radical his vision is. Can he make it work?

585. A Social Activist in Prime Minister’s Clothing

So you want to help people? That’s great — but beware the law of unintended consequences. Three stories from the modern workplace.

584. How to Pave the Road to Hell

The psychologist Daniel Kahneman — a Nobel laureate and the author of “Thinking, Fast and Slow” — recently died at age 90. Along with his collaborator Amos Tversky, he changed how we all think about decision-making. The journalist Michael Lewis told the Kahneman-Tversky story in a 2016 book called "The Undoing Project." In this episode, Lewis explains why they had such a profound influence.

Extra: The Men Who Started a Thinking Revolution (Update)

People who are good at their jobs routinely get promoted into bigger jobs they’re bad at. We explain why firms keep producing incompetent managers — and why that’s unlikely to change.

Why Are There So Many Bad Bosses? (Update)

Fareed Zakaria says yes. But it’s not just political revolution — it’s economic, technological, even emotional. He doesn’t offer easy solutions but he does offer some hope.

The Economics of Everyday Things: Used Hotel Soaps

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