183: Transformative experiences (L. A. Paul)

April 30, 2017 What if you had the opportunity to become a vampire, irreversibly — and everyone you knew who had become one said “It’s utterly indescribable.” Would you take the leap, not knowing what it would feel like, or how it would change your personality and values? That’s an example of what philosopher L. A. … Read more

181: Moral uncertainty (Will MacAskill)

April 2, 2017 This episode introduces “moral uncertainty,” the idea that you shouldn’t be overly confident in your moral judgments — like whether it’s okay to eat meat, for example, or whether it’s okay to abort a baby. The episode’s guest is Will MacAskill, a founder of the effective altruism movement and Oxford professor of philosophy. … Read more

180: The worm wars (David Roodman)

March 19, 2017 In this episode of Rationally Speaking, Julia talks with economics and public policy expert David Roodman about the “Worm Wars” in social science — the debate over whether deworming pills are an effective way to fight poverty. Along the way they discuss how to analyze a study, the differences between  economists and epidemiologists, and … Read more

179: Is economics more art or science? (Dani Rodrik)

March 5, 2017 This episode features Harvard economist Dani Rodrik, talking about the epistemology of economics: Are there any general “laws” of economics that we can be really confident in? Do economists discard models if the data doesn’t support them? And why do economists disagree with each other? Transcript (PDF)

178: Trying to live well, as semi-rational animals (Tim Urban)

February 19, 2017 This episode features Tim Urban, author of popular longform illustrated blog Wait But Why. Julia and Tim explore one of their common interests: the tension between the rational and irrational aspects of human nature. Is there any value in the “irrational” parts of us (such as Tim’s colorfully named “instant gratification monkey” and “social … Read more

177: The science and ethics of kidney donation (Dylan Matthews)

February 5, 2017 If you’re a healthy adult, should you donate one of your kidneys to a stranger? This episode features journalist Dylan Matthews, who donated his kidney last year. He and Julia discuss the clever design of “donor chains,” how we should evaluate the science about whether kidney donation is safe, and whether we have … Read more

176: Against democracy (Jason Brennan)

January 22, 2017 Churchill famously called democracy “the worst system of government, except for all the others that have been tried.” Could we do better? On this episode of Rationally Speaking, Julia chats with professor Jason Brennan, author of the book “Against Democracy,” about his case for why democracy is flawed — philosophically, morally, and empirically. Transcript (PDF)

175: Do sweatshops reduce poverty? (Chris Blattman)

January 8, 2017 This episode explores the economics and ethics of low-paying factories (which some might call “sweatshops”) in Ethiopia. Do they make their workers better off, relative to those people’s outside options? Professor Chris Blattman has run some well-designed randomized controlled trials exploring this question, and he discusses what surprised him and how he’s updated his … Read more

174: What happened to evidence-based medicine? (John Ioannidis)

December 11, 2016 Over the last two decades, the Evidence-Based Medicine (EBM) movement has transformed medical science, pushing doctors to rely less on intuition or “common wisdom” in choosing treatments, and more on evidence from studies. Sounds great — but has EBM become a victim of its own success? This episode features John Ioannidis, Stanford professor … Read more