This book provides researchers, evaluators, and graduate students with a user-friendly presentation of Campbell's essential work (including his thoughts on some of his classic works) in social experimentation.

Variations in Organization Science celebrates Donald T Campbell's many contributions to organization science, presenting new variations which stem directly from his work.Contributing authors review and extend Campbell's theories in four major areas: blind variation, selection and retention especially inside firms; multilevel co-evolution in organizational parts and wholes; process level analysis and modeling epistemology and methodology. The book includes an unusual appendix, Donald T Campbell's curriculum vitae.

Regression toward the mean is a complex statistical principle that plays a crucial role in any research involving the measurement of change. This primer is designed to help researchers more fully understand this phenomenon and avoid common errors in interpretation. The book presents new methods of graphing regression toward the mean, facilitating comprehension with a wealth of figures and diagrams. Special attention is given to applications related to program or treatment evaluation. Numerous concrete examples illustrate the ways researchers all too often attribute effects to an intervention...