“The Research Is Clear: Long Hours Backfire for People and for Companies” – Harvard Business Review, August 19, 2015
The bottom line: The “overwork story” is one of diminishing returns—keep overworking, and you’ll progressively work less well on tasks that are increasingly meaningless. There’s a large body of research suggesting that regardless of our reasons for working long hours, overwork does not help us. Not only does it not seem to result in more output, but considerable evidence shows that overwork harms both employees and the companies they work for.