The large market size and abundant resources of the Greater Mekong Subregion (GMS), including a large, motivated and cheap workforce, a rich agricultural base, extensive timber and fisheries resources, considerable potential mineral resources, and vast energy resources have seen the subregion increasingly recognized as a new frontier of Southeast Asian economic strength. This book aims to assess the recent economic, social and political developments in the GMS and identify emerging opportunities and challenges facing the successful transition towards a market-driven economy. The countries of the GMS are at a critical juncture where subregional efforts and cooperation must be made to fully address the rapidly evolving issues that are vital to appropriate policy formation, yet which remain widely debatable. The deliberations here shed light on the development stages and offer policy recommendations for pushing forward subregional cooperation.