Monday assorted links by Tyler Cowen November 29, 2021 at 11:52 am 1. Is China destined to become the world’s largest economy? 2. The Flynn effect, looking at individual twins. 3. Do insects have emotions? 4. Manhattan of the (late) Middle Ages? 5. Wastewater data from South Africa. Is this good news or bad news? And NYT update on vaccine efficacy. 6. 20 Sondheim songs.