The purpose of this book is to formulate economic models of the advantages and costs of transparency in various areas of public sector activity and to assess what level of obfuscation in politics is rational. The chapters are arranged in four parts. Part 1 is concerned with the manifestations of transparency and obfuscation in domestic democratic settings whilst Part 2 deals with the same realities but in an international context. Part 3 looks at corruption and Part 4 considers some of the implications of transparency and obfuscation for the working of governments and the formulation of public policies.