Paul Krugman on Challenging Zombie Ideas

Episode Summary

Executive Summary: Barry Ritholtz interviews Paul Krugman about his new book, his intellectual path, and the economic and political ideas he calls “zombies”: false beliefs that persist despite evidence. The conversation covers trade, inequality, climate change, financial crises, media bias, healthcare, and the future of U.S. democracy, with Krugman arguing that facts, not ideology, should guide policy.

Main Topics: Krugman’s intellectual path and writing style: He traces his interest in economics to Asimov’s Foundation trilogy, explains why he writes for both academic and public audiences, and describes his textbook as story-driven and real-world oriented. Media bias and false equivalence: Krugman argues mainstream media often gets facts right but fails by presenting false balance, especially when one side is simply wrong; he also critiques the obsession with “very serious people.” Trade, globalization, and localized harm: He defends free trade in principle while emphasizing its concentrated harms on specific communities and explaining why trade adjustment alone cannot fix structural disruption. Financial crisis, austerity, and economic theory: Krugman discusses how housing and shadow banking bubbles were visible before 2008, why economists missed the crisis, and why Keynesian analysis proved more accurate than austerity narratives afterward. Climate change as existential threat: He treats climate change as the most urgent policy issue, criticizes denial, and argues that technology plus carbon pricing can solve it if politics allows action. Inequality, CEO pay, and social polarization: Krugman describes rising inequality as real, politically consequential, and tied to shifts in bargaining power, tax policy, and the erosion of labor institutions. 2020 politics, democracy, and the future: He says Trump-era polarization could threaten democracy, thinks a Democratic win would likely produce an enhanced Obamacare rather than sweeping reform, and warns of authoritarian drift.

Key Arguments: Economics became his path to the “social scientists save the universe” role imagined in Foundation, shaping his lifelong interest in policy and systems. The media often falls into false equivalence, treating unequal or factually false positions as if both deserve equal weight. “Very serious people” are often elite status cues rather than reliable thinkers; credentials and influence can substitute for actual expertise. Free trade can raise overall prosperity but concentrates pain in specific regions and industries, making the political backlash understandable even if the economics remain favorable. The 2008 crisis should have been anticipated through obvious housing valuation metrics and warning signs in shadow banking. Post-crisis Keynesian predictions about stimulus, inflation, and austerity were largely correct, while the “serious” anti-stimulus arguments failed. Climate change is a far larger issue than trade, with solutions available through investment, innovation, and carbon pricing, but blocked by politics. Inequality has risen dramatically, driven less by technology alone than by power shifts, union decline, tax changes, and changing norms around executive compensation. Trump’s economic record is strongest where he made few promises and weakest where he promised help, such as manufacturing and farming. The biggest current threats are climate denial, tax-cut myths, inequality denial, and the erosion of democratic norms.

Data Points: Books authored or edited: 27 - Krugman’s publication output as described in the introduction. Scholarly articles published: Over 200 - His academic publication record. College syllabi ranking: Second most cited author - Referenced as one of the most assigned economics authors in college courses. CEO pay multiple: More than 300 times average worker pay - Used to illustrate modern inequality and shifts in bargaining power. Federal aid to Kentucky: About 20% of GDP - Example of de facto redistribution from federal programs to distressed regions. Share of Republicans in Congress denying climate change: 60% - Krugman cites congressional denial as evidence of entrenched climate zombie ideas. Trump election margin: About 150,000 votes across five states - Krugman discusses 2016 as an extremely narrow Electoral College victory. Market/economy growth rate threshold: Around 2% - Krugman notes political scientists view election effects as more sensitive to growth rate than level. Potential tax rate for Laffer curve relevance: Around 80% - Krugman says the Laffer curve is not relevant for the U.S. at current rates. Time after crisis when Keynesian models looked right: About five years - He says post-2008 outcomes validated Keynesian predictions on stimulus and austerity. Housing bubble timing: 2005-2007 - He references columns warning of bubbles and the coming financial crisis before 2008. Free trade example: jobs displaced by Chinese furniture imports: More than 100,000; maybe even 200,000 - Illustrates concentrated local impacts of trade shocks.

Pivotal Quotes: "social scientists save the universe" — Paul Krugman: Explaining how Asimov’s Foundation trilogy influenced his interest in economics. "the media are really terrible" — Paul Krugman: On false equivalence and the inability of mainstream media to handle cases where one side is plainly wrong. "The belief that it's a hoax, or at least that it's not really serious, or anyway, there's nothing we can do about it" — Paul Krugman: Describing climate denial as one of the two biggest “zombie” ideas in his book.

Implications: Listeners are urged to be skeptical of elite consensus, false balance, and policy myths. Krugman’s view suggests the biggest near-term stakes are climate action, inequality, and democratic resilience, with evidence-based economics still central to good policy.