"This book is written to provide detailed, rigorous guidance on how to conduct impact evaluations of government and nongovernment programs and projects. It covers all the leading quantitative impact evaluation methods, explaining the assumptions required for them to provide unbiased estimates and the data required to implement them. It also provides many examples of how these methods have been applied in developing economies. The book’s contents are based on lectures given by the authors, and their collaborators, as part of a two-week intensive course conducted in China, Peru, South Africa, and Uganda between 2012 and 2017. The courses in China, South Africa, and Uganda were administered and supported by the Centers for Learning on Evaluation and Results (CLEAR) Initiative, a multidonor partnership program for evaluation capacity development with its secretariat at the World Bank and centers located in universities in different parts of the world; in 2020, the program and centers became part of the Global Evaluation Initiative. The presentation of the material in this book is at a high technical level. It assumes that the reader is very comfortable with algebra and has an intermediate knowledge of statistical theory. It is essentially a graduate-level textbook for use in economics, public policy, or related academic programs, although it may also be useful for a course designed for advanced undergraduate students." (Preface)