@alphacyberranger Most "4 day week" offers that I read so far just spread out 40 hours of work to 4 days x 10h instead of 5 days x 8h. I don't see the point in that and I do not think that is what this study intended. :)
How would that work? By law you are not allowed to work more than 10h a day in Germany (only exceptions which you have to justify, else you can get in trouble)
Well, 4x10h are not more than 10h a day, right? And if it is 4x9,25h (37h week), then you even are able to do 0,75h overtime per day, still within the bounds of law. At least that was my understanding.