How Rahm Emanuel Would Run the World (People I (Mostly) Admire Ep. 36)

In this interview, first heard on Freakonomics Radio last year, Steve talks with the former top adviser to presidents Clinton and Obama, about his record — and his reputation. And Rahm explains that while he believes in the power of the federal government, as former mayor of Chicago, he says that cities are where problems really get solved.

Travis Tygart Is Coming for Cheaters — Just Ask Lance Armstrong (People I (Mostly) Admire Ep. 33)

He’s the C.E.O. of the United States Anti-Doping Agency (USADA), which, under his charge, exposed the most celebrated American cyclist as a cheater. And Steve’s been studying cheaters for the last 25 years, so he’s also excited to talk to Travis about the incentives to cheat and the advances in testing technology — and offers his services as an anti-doping data detective for the sport of horse racing.

Angela Duckworth Explains How to Manage Your Goal Hierarchy (People I (Mostly) Admire Ep. 32)

She’s the author of the bestselling book Grit, and a University of Pennsylvania professor of psychology — a field Steve says he knows nothing about. 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.

Peter Leeson on Why Trial-by-Fire Wasn’t Barbaric and Why Pirates Were Democratic (People I (Mostly) Admire Ep. 31)

He’s an economist who studies even weirder things than Steve. They discuss whether economics is the best of the social sciences, and why it’s a good idea to get a tattoo of a demand curve on your bicep.

Bruce Friedrich Thinks There’s a Better Way to Eat Meat (People I (Mostly) Admire Ep. 29)

Levitt rarely interviews advocates, but the founder of the Good Food Institute is different. Once an outspoken — and sometimes outlandish — animal-rights activist, Bruce has come to believe that market-driven innovation and scientific advancement are the best ways to reduce global meat consumption. Steve and Bruce talk about the negative externalities of factory-farmed meat, and why Bruce gave up antics like streaking at Buckingham Palace.

Daniel Kahneman on Why Our Judgment is Flawed — and What to Do About It (People I (Mostly) Admire Ep. 27)

Nobel laureate, best-selling author, and groundbreaking psychologist Daniel Kahneman is also a friend and former business partner of Steve’s. In discussing Danny’s new book Noise: A Flaw in Human Judgment, the two spar over inconsistencies in criminal sentencing and Danny tells Steve that “Your attitude is unusual” — no surprise there.

Memory Champion Nelson Dellis Helps Steve Train His Brain (People I (Mostly) Admire Ep. 26)

He’s one of the world’s leading competitors, having won four U.S. memory tournaments and holding the record for most names memorized in 15 minutes (235!). But Nelson Dellis claims he was born with an average memory and that anyone can learn his tricks. Steve gives Nelson’s techniques a shot, without much hope — and is surprised by the result.

Sam Harris: “Spirituality Is a Loaded Term.” (People I (Mostly) Admire Ep. 25)

He’s a cognitive neuroscientist and philosopher who has written five best-selling books. Sam Harris also hosts the Making Sense podcast and helps people discover meditation through his Waking Up app. Sam explains to Steve how to become spiritual as a skeptic and commit to never lying again.

Nathan Myhrvold: “I Am Interested in Lots of Things, and That’s Actually a Bad Strategy.” (People I (Mostly) Admire Ep. 6 Rebroadcast)

He graduated high school at 14, and by 23 had several graduate degrees and was a research assistant with Stephen Hawking. He became the first chief technology officer at Microsoft (without having ever studied computer science) and then started a company focused on big questions — like how to provide the world with clean energy and how to optimize pizza-baking. Find out what makes Nathan Myhrvold’s fertile mind tick, and which of his many ideas Steve Levitt likes the most.

How to Manage Your Goal Hierarchy (Ep. 458)

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.