The available evidence shows that for ordinary jobs output turns negative once you start working more than 40 hours a week or so. I personally doubt that decisi

The available evidence shows that for ordinary jobs output turns negative once you start working more than 40 hours a week or so. I personally doubt that decision making by executives is an exception to this rule: quite the contrary in fact. Unfortunately career development can often be an arms race: those who put in the longest hours are perceived to be more committed and effective and are promoted in preference to their colleagues who may be just as effective but are "only" in the office 40 hours a week. Arms races are pernicious things that benefit nobody, but can be very difficult to eliminate unfortunately.