One interesting consequence of this is that the further west that you look within a timezone, the less sleep people tend to get. > Examination of ATUS activity

One interesting consequence of this is that the further west that you look within a timezone, the less sleep people tend to get. > Examination of ATUS activity logs shows that workers experiencing earlier sunset also go to bed earlier and that this correlation between sunset and bedtime persists even if the worker goes to bed well after dark. Coordinated work start times translate this earlier bedtime into longer sleep. Time Use and Productivity: The Wage Returns to Sleep, Matthew Gibson and Jeffrey Shrader