Why Isn’t Europe Poorer Than the US?
https://www.project-syndicate.org/commentary/european-living-standards-will-not-stay-high-without-innovation-krugman-aghion-debate-by-dalia-marin-2026-06
The Mismeasurement of Europe’s Productivity
https://www.project-syndicate.org/onpoint/paul-krugman-is-wrong-about-us-europe-productivity-gap-by-philippe-aghion-et-al-2026-05
Europe Versus America: A Response to the Critics by Paul Krugman
https://paulkrugman.substack.com/p/europe-versus-america-a-response
https://www.project-syndicate.org/commentary/european-living-standards-will-not-stay-high-without-innovation-krugman-aghion-debate-by-dalia-marin-2026-06
https://www.project-syndicate.org/onpoint/paul-krugman-is-wrong-about-us-europe-productivity-gap-by-philippe-aghion-et-al-2026-05
https://paulkrugman.substack.com/p/europe-versus-america-a-response