Saturday assorted links by Tyler Cowen November 20, 2021 at 12:36 pm 1. The greedy doctor problem. 2. Potemkin Village Markets in everything nothing short video. 3. How AlphaZero learns chess, with Kramnik too. 4. Employment for the disabled has been rising. 5. Itai Sher, on experts. 6. The essays of Karen Vaughn, noting she is very much an underrated figure in the GMU story. 7. Africa and Covid heterogeneities.