Friday assorted links

1. 1950-2020, what predicts U.S. urban density?

2. Will AI want to self-improve?

3. Interview with Arnie.

4. Ross against marijuana legalilization (NYT).

5. Rasheed Griffith on Caribbean dollarization.

6. “One of the most common mistakes in American politics today is to suppose that rival groups pose an “existential threat” when they, in fact, do not.”  David Corey’s critique of the New Right.

7. Thomas Sargent on learning from Lucas.