Productivity in the Open

http://www.businessinsider.com/the-real-reason-for-the-40-hour-workweek-2014-6

This is very accurate in my opinion.

I recently ran into this post on The Economist and found it quite compelling in the sense that we need to rather focus than waste a lot of time fidgeting or wondering about the office with no clear purpose at hand. Fewer working hours, more personal life, more creativity and improvement you can bring to the world.
http://www.economist.com/blogs/freeexchange/2014/12/working-hours