Call it corporate hazing: many companies reward workers, either monetarily or with social capital, for working round the clock, both at the office and after hours. Think about the last time you heard someone at your business described as a "good worker" or a "team player." Implicit in the descriptor? "This is a worker who is never off duty." There's just one problem, of course. Studies suggest that working more hours might actually make workers less productive, not more.