Over the past decades, the world has witnessed an unprecedented growth in global value chains, propelled by increasingly demanding quality standards. These trends lead to concerns about the impact of value chains on development and poverty and about the possible protectionist nature of quality standards in rich countries. This book offers the first integrated theoretical analysis of the economic and political factors which determine the level of quality standards, as well as their economic effects along the value chain. Using realistic assumptions motivated by empirical research, the theoretical framework in this book makes it possible to study the efficiency effects as well as the distributional consequences of one of the most striking evolutions affecting global trade and development today.