This book provides the most comprehensive study of the Australian think-tank industry to date. Drawing on empirical evidence, it first assesses the structure of the industry, the methods think tanks use to persuade policymakers, and public perceptions of their effectiveness. The book then proceeds to examine three unique policy cases to analyse think tank influence on policymaking. It argues that whilst think tanks play important roles in Australia policy process, their impacts vary depending on their approach and objectives. The book also demonstrates that policymakers with contrasting ideological orientations diverge in their assessments of the utility and influence of think tanks. It will appeal to students and scholars of public policy, and practitioners in public administration and governance.