Policy design efforts are often hampered by an inadequate understanding of how policy tools and actions promote effective policies. This book addresses this gap by proposing a causal theory of the linkages between policy actions and policy effects. Adopting a mechanistic perspective, it identifies the causal processes that activate policy effects and help achieve policy goals. Bringing together established and emerging scholars in the field, Making Policies Work introduces new concepts of first- and second- order policy mechanisms developed from epistemological and theoretical perspectives, and considers how they can be activated through design. Theoretical concepts are explored through empirical cases from different policy arenas and contemporary policy issues such as partnerships in healthcare, food waste prevention, retirement savings, EU regulations and public sector reform.Graduate students in public policy, public administration and political science will find the powerful analytical tools offered in this book useful in exploring the theoretical elements of effective policy design. Policymakers and practitioners in governmental and non-governmental organisations interested in the practical applications will also benefit from reading this timely book.