The dramatic increase in the number of corporate ethical codes over the past 20 years has been attributed to the Watergate scandal and the Foreign Corrupt Practices Act. Ethical codes differ somewhat from profesional codes and mission statements; yet the terms are frequently interchanged and often confused in the literature. Ethical code studies are reviewed in terms of how codes are communicated to employees and whether implications for violating codes are discussed. Most studies use content analysis to determine subjects in codes. Little information is available about how codes are communicated, whether they are accepted and used by employees, and whether they affect employee/corporate behavior. More research on ethical codes is needed to answer some of these questions.