Against the background of accelerating globalisation and growing economic interdependence in northeast Asia over the past two decades, including the recent global economic crisis, this book sets out to examine the status and prospect of cross-border co-operation. It has synthesised diverse strands of discussion and different country perspectives to highlight the challenges and opportunities of collaborative regional development in northeast Asia. Distinct from previous studies, this book attempts to capture international, national, and local viewpoints in regional development. Practical experience across countries has been analysed and consolidated to form the basis of a policy agenda for cross-border co-operation.