The author draws on the policy analysis literature to delineate the linkage between conceptualization of risk and the formulation and proposed solution of risk-related policy problems. Two concepts of risk are identified: a concept of risk as a physically given attribute of hazardous technologies and a concept of risk as a socially constructed attribute. The argument is advanced that the social construction of risk provides a firm, theoretical basis for the design of policy. The discussion links the perception, manage ment, (...) and communication of risk to the more fundamental issue of the nature and role of science and technology. (shrink)