Monday assorted links
1. Why might poor white Americans feel especially bad?
2. Raj Chetty talk on Covid-19, coming this Wednesday. And forthcoming seminar on what students think of on-line education.
3. Study of T-cell immunity in Singapore. Small numbers, but of interest.
4. Useful list of top economics blogs.
5. Woman in China, 45, made S$589,800 by buying insurance on flights she predicted would get delayed.