Earlier quoted context omitted.
Please cite the 100+ years of research. I've looked into it, and found very little. All I've found is a few results like the average construction worker can only productively work 60 hour weeks for about 6 weeks in a row before fatigue sets in. For example: http://www.danzpage.com/Construction-Management-Resources/Ca... (Hourly productivity is lower during the 60 hour weeks, but weekly product is higher.) I have neve…
You keep popping up on these threads making wild claims like this. You're like an evolution denier, you keep pushing this weird agenda, but I just don't understand why. People keep giving you the research and yet somehow you don't read it and then claim there is none. It is simple to find research about manual work showing 40 hours per week is optimal. It is simple to find research showing that for knowledge workers…
Last time you you were trying to claim 40-60 hours was an 'optimal' working time for manual labour and linked research yourself which showed that it wasn't.
The research linked to shows that weekly product (which is not the same as hourly productivity) can be maximized by anything from 40-60 hours, depending on the nature of the work and the duration of the project.
For example, look at Figure 16 which has numbers:
100% productivity x 40 hours = 40
90% productivity x 50 hours = 45
83% productivity x 60 hours = 49.8
69% productivity x 70 hours = 48.3
Output is maximized by 60 hour weeks.Figure 6 shows similar results, based on eyeballing the 5 and 6 day weeks (10 hours/day each) as being about 83% productivity. (Data is in a bar chart, numbers not listed.)
http://www.danzpage.com/Construction-Management-Resources/Ca...
In any case, any paper discussing averages (i.e., every source I've ever found) simply does not address the question of whether the author of the piece can productively work 60 hour weeks. That's like saying "the mean American wage is $50k/year or so, therefore it's impossible for a software engineer to earn $100k".