Hi. I'm new to AJA. I am familiar with a study done in policing – a randomized experiment with 8-, 10-, and 12-hour shifts by Karen Amendola of the National Policing Institute. It might be interesting to look at:
Abstract
This report details the experimental study of 8-, 10-, and 12-hour shifts conducted in the Arlington (TX) and Detroit (MI) Police Departments. The findings suggest that officers on 10-hour schedules worked the least amount of overtime, got significantly more sleep (about 170 additional hours per year), and the agencies paid out the least amount of overtime for those on 10-hour shifts. Compressed schedules of 12 hours were not associated with differences in our outcomes, other than officers' reports of lowered alertness on the job and increased sleepiness. Agencies should use caution in implementing such schedules.
I believe the report can be found at: https://www.policinginstitute.org/publication/shift-length-experiment/