I doubt that anyone gets twice as much work done in 8 hours as opposed to 4. This is like saying that you get 50% more work in when working 12 hours as opposed

I doubt that anyone gets twice as much work done in 8 hours as opposed to 4. This is like saying that you get 50% more work in when working 12 hours as opposed to 8. The real problem in knowledge industries as far as I can see is that too many people work more than 8 hours per day.