S9 Ep5: Is US debt sustainable?

Another special episode recorded at the CEPR annual symposium in Paris.When does the level of debt in the US become a problem for the economy, and for ordinary Americans? And when it does, what are the policy options to fix it?That’s the topic of a Chapter in the CEPR book. The authors are Ugo Panizza of the Graduate Institute, Geneva and CEPR, and Antonio Fatás of INSEAD and CEPR. They talk to Tim Phillips about how recent policy – notably the One Big Beautiful Bill Act – is blowing up US debt and warn that the administration can’t keep kicking the can down the road for ever.

Stablecoins are digital tokens, pegged to a fiat currency. What could possibly go wrong?For one type of stablecoin the answer is: plenty, according to Richard Portes. The founder and honorary president of CEPR is also co-chair of the European Systemic Risk Board Crypto Asset Task Force. In this role he has been investigating the risks of multi-issuer stablecoins in Europe. He tells Tim Phillips that, if one of these stablecoins hit trouble, US holders could use European regulation to recover their investment from the coin’s European reserves. And that, he argues, would be a threat to Europe’s financial stability.

In another of our special episodes recorded at the CEPR annual Symposium, we ask: is it time for Europe to rearm?The message from the US could not be clearer: it is time for European countries to take care of their own security. If Europe decides to rearm, it has the industrial base – but Moritz Schularick of the Kiel Institute and CEPR warns that it isn’t converting that capacity into credible deterrence. Tim Phillips asks him what European rearmament could mean in practice: not just scaling up production but buying smarter and investing in next-generation technologies that can spill over into the wider economy. And is there enough political will to create a European defence architecture that can stand on its own?

In another of our episodes recorded at the CEPR Paris Symposium, we ask: When Gen AI can do an undergraduate’s problem set in seconds, how should teaching, and the syllabus, respond? Who better to answer this than Wendy Carlin of UCL and CEPR? Wendy – who has recently become Dame Wendy – was at the symposium to talk about her project to change economics teaching through the CORE Project, which more than 500 institutions use to teach introductory economics in a way that flips the standard textbook treatment on it head.Recently Wendy and CORE have been working to harness the power of AI to help students apply their knowledge in unfamiliar settings, to reason and discriminate, to make AI into what she calls “A cognitive sparring partner”. She tells Tim Phillips what that means for the Economics Major, and why that might create economics graduates with the skills that employers value. Try CORE, it’s free: https://core-econ.org

Another special episode recorded at the CEPR annual symposium in Paris. The Trump administration says it wants America to lead in AI, but what does that mean in practice for trade and productivity? Will AI make growth great again, or just inflate a short-term capital spending boom?Gary Gensler of MIT and CEPR (also a former chair of the Securities and Exchange Commission) unpacks the administration’s AI action plan, helps us work out what's happening to export controls, and untangles the deal-making geopolitics of AI hardware. 

At the CEPR annual Symposium in Paris we sat down with Adam Posen, president of the Peterson Institute for International Economics, a distinguished fellow of CEPR, and a global authority on geopolitics and trade to discuss the profound changes in the multilateral order in 2025, how countries will adjust to this new normal – and whether the changes we have seen will ever be unwound.

Who would be a policymaker right now? The list of economic problems that we need to solve ranges from “very difficult” to “existential”. An ambitious new book collects the ideas of many influential economists on how to approach these challenges. But can it avoid the mistakes of previous attempts to find an economic policy consensus?Andrés Velasco and Tim Besley are two of the editors of The London Consensus. Tim Phillips joined them at The London School of Economics to ask why the book was created, how policymakers can use it, and whether we should be wary of economists bearing paradigms.Here's a link to the the book (you can download it too).

Economic sanctions are the big geoeconomic bazooka. But what does history tell us about how well they work, and their relevance today. And does the theory match the data?Moritz Schularick of the Kiel Institute for the World Economy and CEPR talks to Tim Phillips about the evidence of the history of sanctions on what they can achieve, whether we expect too much too soon from small sanctions – and whether politicians are prepared to impose the sanctions that bite.

Biodiversity is essential for the wide range of economic activities that our planet needs. Yet, the economic consequences of its global decline are hard to estimate, because most population studies focus on individual species in isolation.Frederik Noack of the University of British Columbia argues that this misses a central insight about biodiversity: a healthy environment depends not just on individual species, but also on the way they work together to keep our natural environment in balance. One especially important aspect of this is the way that birds help keep crops safe from pests and reduce the need for pesticides.He tells Tim Phillips about the long-term decline of bird populations in the US and the knock-on effect on agriculture, and pollution. 

In 2021, at COP26, the International Accounting Standards Board announced it would create a standard for this reporting.It wants to integrate sustainability reporting with traditional IFRS accounting. Should firms be compelled by regulators to disclose their impact on the climate in their corporate reporting? Investors value convergence in sustainability reporting standards, but they are facing stiff opposition both in the US and Europe – even while developing economies embrace the new regime.Lucrezia Reichlin of the London Business School and CEPR talked to Tim Phillips on the progress to sustainability standards, the scope of reporting, who wants it, and who’s objecting to it.