Providing state-of-the-art perspectives on what evaluation is, its purpose, and how to ensure it is done well, this book brings together major evaluation researchers from a variety of social and behavioral science disciplines. Each chapter identifies a fundamental issue facing the field today; considers its implications for theory, method, practice, or the profession; and explores one or more approaches to dealing with the issue. Among the topics addressed are the nature of expertise in evaluation, how to build a better evidence base for evaluation theory, promoting cultural competence in evaluation, how to synthesize evaluation research findings, ways to involve stakeholders in decision making, and much more.