Fascinating figure from a new paper about the California Gold Rush and the geographic and educational background of miners who participated therein. Turns out that huge chunks of the working-age population disappeared westward-bound.
Source: Migrating to Riches? Evidence from the California Gold Rush, Karen Clay & Randall Jones. Journal of Economic History
Related posts:
Yeah, noticed that too. Took me a while to figure out that it was a sorting issue, not an outright error.