Program Theory in Evaluation Practice is a ground-breaking reference that teaches how to develop an explicit causal model that links an intervention (project, program or policy) with its intended or observed impacts and using this to guide monitoring and evaluation. Peerless in its explanation of why and how to use and develop program theory, the book is rich with examples and alternative approaches. The book is an invaluable resource to faculty and students as well as professionals in professional development programs, education, social work, and counseling.