MELBOURNE, Australia

--Something new is happening at Harvard Business School. As graduation nears for the first class to complete their Master of Business Administration since the onset of the global financial crisis, students are circulating an oath that commits them to pursue their work "in an ethical manner"; "to strive to create sustainable economic, social, and environmental prosperity worldwide"; and to manage their enterprises "in good faith, guarding against decisions and behavior that advance my own narrow ambitions but harm the enterprise and the societies it serves."

The wording of the new MBA oath draws on one adopted in 2006 by the Thunderbird School of Global Management, based in Arizona. Nevertheless, the fact that it has been taken up by the world's most famous business school is significant.

As of this writing, about 20 percent of the Harvard graduating class have taken the oath. That will, of course, prompt cynics to ask: "What about the other 80 percent?" But those who have taken the oath are part of a larger turn toward ethics that has followed the recent flood of revelations of dishonesty and greed in the financial sector. Interest in business ethics courses has surged, and student activities at leading business schools are more focused than ever before on making business serve long-term social values.

Business ethics has always had problems that are distinct from those of other professions, such as medicine, law, engineering, dentistry, or nursing. A member of my family recently had an eye problem, and was referred by her general practitioner to an eye surgeon. The surgeon examined the eye, said that it didn't need surgery, and sent her back to the general practitioner.

That is no more than one would expect from a doctor who is true to the ethics of the profession, my medical friends tell me. By contrast, it's hard to imagine going to a car dealer and being advised that you don't really need a new car.

For physicians, the idea of swearing an oath to act ethically goes back to Hippocrates. Every profession will have its rogues, of course, no matter what oaths are sworn, but many health care professionals have a real commitment to serving the best interests of their clients.

RULES OF THE GAME