In this special crossover episode, People I (Mostly) Admire host Steve Levitt admits to No Stupid Questions co-host Angela Duckworth that he knows almost nothing about psychology. But once Angela gives Steve a quick tutorial on “goal conflict,” he is suddenly a fan. They also talk parenting, self-esteem, and how easy it is to learn econometrics if you feel like it.

Kidney failure is such a catastrophic (and expensive) disease that Medicare covers treatment for anyone, regardless of age. Since Medicare reimbursement rates are fairly low, the dialysis industry had to find a way to tweak the system if they wanted to make big profits. They succeeded.

Medicine has evolved from a calling into an industry, adept at dispensing procedures and pills (and gigantic bills), but less good at actual health. Most reformers call for big, bold action. What happens if, instead, you think small?

Why do so many promising solutions — in education, medicine, criminal justice, etc. — fail to scale up into great policy? And can a new breed of “implementation scientists” crack the code?

In a word: networks. Once it embraced information as its main currency, New York was able to climb out of a deep fiscal (and psychic) pit. Will that magic trick still work after Covid? In this installment of the Freakonomics Radio Book Club, guest host Kurt Andersen interviews Thomas Dyja, author of New York, New York, New York: Four Decades of Success, Excess and Transformation.

Behavioral scientists have been exploring if — and when — a psychological reset can lead to lasting change. We survey evidence from the London Underground, Major League Baseball, and New Year’s resolutions; we look at accidental fresh starts, forced fresh starts, and fresh starts that backfire. And we wonder: will the pandemic’s end provide the biggest fresh start ever?

Americans are so accustomed to the standard intersection that we rarely consider how dangerous it can be — as well as costly, time-wasting, and polluting. Is it time to embrace the lowly, lovely roundabout?

New York Times columnist Charles Blow argues that white supremacy in America will never fully recede, and that it’s time for Black people to do something radical about it. In The Devil You Know: A Black Power Manifesto, he urges a “reverse migration” to the South to consolidate political power and create a region where it’s safe to be Black. (This is an episode of the Freakonomics Radio Book Club.)

Researchers are trying to figure out who gets bored — and why — and what it means for ourselves and the economy. But maybe there’s an upside to boredom?

Not so long ago, G.E. was the most valuable company in the world, a conglomerate that included everything from light bulbs and jet engines to financial services and The Apprentice. Now it’s selling off body parts to survive. What does the C.E.O. who presided over the decline have to say for himself?