The topic of the article is how moral development theory can enlighten the understanding of ethical behaviour in business. It discusses previous research on the subject, and reports an empirical study of academics (engineers and business economists with a master degree) working in the private sector in Norway.Moral development theory is based on a long research tradition, and many researchers within business ethics have assumed the importance of moral reasoning in business environments. However, the truth of these assumptions has not (...) been confirmed by previous empirical research. (shrink)