Tuesday assorted links by Tyler Cowen May 5, 2026 at 12:09 pm 1. How many buildings are “trapped buildings”? 2. Rachel Glennerster defends RCTs in development economics. 3. Why do airlines go bankrupt so often? 4. Why is southern Italy poorer than northern Italy? 5. The economics of correspondence schools in earlier American history. 6. African education is doing worse than we think.