In recent years public management research in a variety of disciplines has paid increasing attention to the role of citizens and the third sector in the provision of public services. Several of these efforts have employed the concept of co-production to better understand and explain this trend. This book aims to go further by systematizing the growing body of academic papers and reports that focus on various aspects of co-production and its potential contribution to new public governance. It has an interdisciplinary focus that makes a unique contribution to the body of knowledge in this field, at the cross-roads of a number of disciplines - including business administration, policy studies, political science, public management, sociology, third sector studies, etc. The unique presentation of them together in this volume both allows for comparing and contrasting these different perspectives and for potential theoretical collaboration and development. More particularly, this volume addresses the following concerns: What is the nature of co-production and what challenges does it face? How can we conceptualize the concept of co-production? How does co-production works in practice? How does co-production unfold in reality? What can be the effects of co-production? And more specific, firstly, how can co-production contribute to service quality and service management in public services, and secondly, what is the input of co-production on growing citizen involvement and development of participative democracy?