1. I am slowly working my way through the spring Brookings Papers on Economic Activity.
2. Martin Sandbu has a new column, "Free Lunch," at the Financial Times. It's solid. Add it to your reading list.
3. "When an extremist—as measured by primary-election campaign receipt patterns—wins a 'coin-flip' election over a more moderate candidate, the party’s general-election vote share decreases by approximately 9–13 percentage points, and the probability that the party wins the seat decreases by 35–54 percentage points." Cool new research from Andy Hall.
4. If you're looking to learn more about big data, as am I, there are some great resources here from the most recent Sackler colloquium, hosted by the National Academy of Sciences. (Via Susan Dynarski.)