the paper has been prepared to help city officials diagnose, investigate, and prevent various kinds of corrupt and illicit behaviour. It focuses on systematic corruption rather than the free-lance activity of a few law-breakers, and emphasises preventive measures rather than purely punitive or moralistic campaigns. The paper approaches the problem from an economic perspective rather than from an ethical viewpoint. It stresses practical steps and considers, albeit schematically, political and administrative tactics. Most of its suggestions involve approaches to preventing corruption and not detailed prescriptions.