The researchers of this track examine the role of scientific expertise in public policies. More widely, its aim is to analyze public decision-making and the implementation of public policies based on the study of technical and scientific regulatory tools (thresholds, classifications, authorizations, prohibitions, etc.). The purpose of these investigations is to demonstrate how the contemporary changes of public policies affect relations and power balances between States, international organizations, industries, trade unions and associations. They combine inputs from sociology, political science and science studies. They give special emphasis on health and environmental issues like environmental health or occupational health, and pay special attention to the role of economic actors in the development of new regulatory tools of health and environmental risks at national, transnational and comparative levels.