Among questions examined are whether models developed in one country can be used in another, and external and internal mechanisms for controlling the quality of prosecution are discussed. Two external controls cited are public control through the mass media, and private control through the actio popularis -- a procedure by which one can complain through the legal system and the courts about the failure to safeguard the interests of injured parties in criminal offenses. Internal control revolves primarily around the issue of guidelines, and the pros and cons of policy guidelines are listed. Cross national studies on prosecutorial decisionmaking and on the role of the victim are described, and a discussion is conducted on whether criminal justice systems are each so unique and owe so much to legal, social, economic, and cultural background that they inhibit international cooperation in crime prevention and control.