The book "Impact Evaluation in Practice: Second Edition" by Paul J. Gertler, Sebastian Martinez, Patrick Premand, Laura B. Rawlings, and Christel M. J. Vermeersch provides a comprehensive guide to conducting impact evaluations in development programs. The second edition updates the content with the latest techniques and implementation advice, expands the set of examples and case studies, and includes new material on research ethics and partnerships. The book is structured into four parts: an introduction to impact evaluation, methods for evaluating programs, implementation strategies, and data collection techniques. It emphasizes the importance of aligning evaluation methods with the operational context, addressing ethical considerations, and disseminating results effectively. The book also highlights the role of impact evaluations in evidence-based policy making, monitoring, and learning, and provides practical guidance on various evaluation methodologies such as randomized assignment, instrumental variables, regression discontinuity design, difference-in-differences, and matching. The authors draw on their extensive experience working with impact evaluations globally and aim to make the book a valuable resource for practitioners, policymakers, and researchers in the international development community.The book "Impact Evaluation in Practice: Second Edition" by Paul J. Gertler, Sebastian Martinez, Patrick Premand, Laura B. Rawlings, and Christel M. J. Vermeersch provides a comprehensive guide to conducting impact evaluations in development programs. The second edition updates the content with the latest techniques and implementation advice, expands the set of examples and case studies, and includes new material on research ethics and partnerships. The book is structured into four parts: an introduction to impact evaluation, methods for evaluating programs, implementation strategies, and data collection techniques. It emphasizes the importance of aligning evaluation methods with the operational context, addressing ethical considerations, and disseminating results effectively. The book also highlights the role of impact evaluations in evidence-based policy making, monitoring, and learning, and provides practical guidance on various evaluation methodologies such as randomized assignment, instrumental variables, regression discontinuity design, difference-in-differences, and matching. The authors draw on their extensive experience working with impact evaluations globally and aim to make the book a valuable resource for practitioners, policymakers, and researchers in the international development community.