Advisory committees are used often in evaluation studies, yet this practice is little discussed or reported. This issue is the first full-length text devoted to the purpose, practice, and scholarship about this type of formal, structured advice. It includes case studies and analyses of these to answer such basic topics as: What is an evaluation advisory group (EAG)? Why (not) use an EAG? How to organize an EAG, and how to evaluate it? The reader will...