The economics of sleep

Full-time, prime-age male workers in the top income quartile sleep around half an hour less per day than those in the lowest quartile.

At the macro level, average sleep duration decreases as a country’s GDP increases.

Higher-income individuals allocate more time to other leisure activities, such as social outings and internet usage, substituting sleep.

Here is the paper by Cristián Jara, Francisca Pérez, and Rodrigo Wagner. Via the excellent Kevin Lewis.