3. New Athey and Imbens survey of applied econometrics, 75 pp. pdf, probably very good.
4. Some major diseases are fading, and for mysterious reasons (NYT). Yet if you are an astronaut, a mysterious syndrome is worsening your sight.
7. It seems there is racial bias in police use of force, but not police shootings. That is an NYT story, do note some limitations in the data, here is the Roland Fryer NBER paper. Good Twitter comments here.