So Gibson and Shrader looked at similar populations that lie at opposite ends of time zones — for instance, Huntsville, Alabama (on the eastern edge of the Central Time Zone), and Amarillo, Texas (on the western edge). Even though cities like this are on the same clock, the western city gets roughly an hour more of sunlight – which means that people there tend to go to bed later. But they have to wake up the same time as people in the eastern city – so, on average, they get less sleep. Gibson and Shrader could then look at the wage data in places like this to see how an extra dose of sleep affects earnings.
But there’s much more in this episode. Among the many voices you’ll hear: