For many managers at global companies, <A HREF="http://www.eweek.com/article2/0,1895,2105597,00.asp?kc=EWWKNEMNL032307EOAD">70-hour weeks are becoming the norm.</A> A global study in the Harvard Business Review showed more than 50 percent of male executives and more than 80 percent of women executives working 60 hours a week or more said they would not be able to keep it up for more than a year.

Women tend to quit such jobs after a few years, the study shows. Men often stay but more than 40 percent who worked those hours experienced "brown-out" within five years and had lost their creative zeal.