Introduction -- Failures in Managing Technological Risk -- Overview: Cases in Point -- Why Government Must Make a Mess of Technological Risk Management -- Three Mile Island: Lessons for America -- Three Mile Island: Lessons for Government -- Love Canal: A Review of Government Actions -- Love Canal: Uncertain Science, Politics, and Law -- The Structure of Technological Risk -- Overview: Causality, Perception, and Uncertainty in Technological Risk -- Causal Structure: A Framework for Policy Formulation -- Rating the Risks: The Structure of Expert and Lay Perceptions -- The Regulation of Carcinogenic Hazards -- Defining Tolerable Risk Levels -- Overview: Towards Determining Acceptable Risk -- Comment on Societal Risk -- Risks of Risk Decisions -- Dealing with Industrial Health Risks: A Stepwise Goal-Oriented Concept -- Longevity Benefits and Costs of Reducing Various Risks -- Agenda for Research -- Overview: Two Research Perspectives -- Issues in Risk Analysis -- A Proposal for International Risk Management Research