Through the use of specific examples to illustrate evaluation research goalsand methods this book provides readers with an overview of the science andpolitics o... » 

Through the use of specific examples to illustrate evaluation research goalsand methods this book provides readers with an overview of the science andpolitics of evaluation research that is comprehensive in the topics coveredbut selective in the details discussed. The Second Edition includes coverage ofmetaanalysis selection models and instrumental variables. In addition theauthors have expanded their sections of the analysis of data evaluation whenthe units of analysis are entire organizations or political jurisdictions andcomparisons between evaluation research and other fields. «