Saturday assorted links

1. Some observations on immigration and wage effects.  The spread of immigrants to incipient high-wage areas may be one rise why the geographic mobility of resident Americans has gone down.

2. No good explanation for why more boys than girls are born after wars.

3. Slides on ticket resale, by Eric Budish.

4. Steven Durlauf recommends five 2025 books in economics.

5. The ongoing rise of YouTube (FT).  “The creator economy advertising market is expected to reach $37bn this year, up 26 per cent from a year ago, according to the estimates by the Interactive Advertising Bureau. The group expects the market to rise another 18 per cent in 2026.”