Using theoretical frameworks to explore the political, organizational, and cultural dynamics of performance budgeting, this book examines the adoption of performance budgeting in a variety of countries, how it has been implemented, and why it succeeded or failed. Chapters include case studies from a wide range of continents and regions including the U.S., Africa, Asia, Australia, Europe, Latin America, and the Middle East. Each case study pays careful attention to the unique historical, political, and cultural contexts of reform and closely examines how performance informed the budgetary process. Chapters investigate theory-driven analysis, focusing on common themes related to international policy diffusion, organizational change, stakeholder politics and gaming, communication and information management, principal–agent dynamics, and institutional constraints. Contributors include both scholars and seasoned practitioners with extensive experience in implementing or advising performance budgeting reforms. With emphases on both theories and practices, this book is written for graduate courses in public budgeting and comparative public administration, providing theoretical insights into budgeting reforms in developing countries, as well as practice-relevant and actionable recommendations for current and future policymakers and budget reformers.