The hours are endless. The pay is paltry. The tasks are often menial, the responsibilities terrifying. And for this, one must spend four years slaving in medical school and acquiring a debt that averages more than $30,000. For decades, doctors have argued the merits of medical residency -- the grueling and sleepless years of specialty training that constitute a rite of passage into American medical practice. Senior physicians defend the traditional residency as a necessary part of the toughening-up process for professionals who must deal with emergencies and late-night awakenings throughout their careers. Young residents complain that it is cruel and...

