Policy is not made in the electoral arena or in the gladiatorial confrontations of Parliament, but in the netherworld of committees, civil servants, professions, and interest groups. This collection explores the private world of public policy. It provides a survey of the literature on the concept of policy networks and demonstrates its importance for understanding specific policy areas. The case studies cover policy-making in agriculture, civil nuclear power, youth employment, smoking, heart disease, sea defences, information technology, and exchange rate policy. Finally the editors attempt an overall assessment of the utility of the concept, focusing on such questions as why networks change, which interests dominate and benefit from networks, and the consequences of the present system for representative democracy. To describe policy networks is not to condone political oligopoly. Britain has witnessed the substitution of private government for public accountability. The analysis of policy networks draws attention to this erosion of representative democracy and exposes the private government of Britain to public gaze.