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Marginalrevolution.com·July 20, 2026

AI Summary

Research shows that geographic areas experiencing economic decline expressed greater hostility toward populist messaging before such campaigns gained prominence in multiple countries. Mathematician Fable discovered a counterexample to the Jacobian conjecture that is simple enough to fit in a single tweet, resolving a longstanding open problem in mathematics.

From the source

1. “In all three countries, declining places displayed higher animosity prior to salient populist campaigns.” In their tweets. 2. Sunstein on Hayek and conservatism. 3. Jacobian conjecture proved false. Fable found a counterexample that fits inside a tweet.…

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