Tuesday assorted links by Tyler Cowen May 2, 2023 at 12:08 pm 1. The richest Americans with Ph.D.s 2. Why it is better that the Beatles split up. 3. Estimate asteroid impacts? 4. SSC on urban density and home prices. And a Scott Sumner reply. 5. An archaeology of books de facto known to GPT-4? 6. Nepo vs. Ding summary.