Tuesday assorted links by Tyler Cowen September 8, 2015 at 12:02 pm in 1. Tambora: a volcano. 2. The coffee culture that is Welsh? 3. The sociology of micro-aggressions. 4. David Colander on Harvard and MIT (pdf). And on Gordon Tullock (pdf). 5. The new first-grade report card. 6. President Obama, Sea-watcher. 7. Humanitarian migrants to Australia are the most entrepreneurial.