Leading social research methodologists and evaluators address the issues of research design in this second of two volumes inspired by the work on Donald Campbell and sponsored by the American Evaluation Association. The book considers issues such as: quasi-experimentation, the proposed conduct of social inquiry, ways to take account of threats to validity, plausible rival hypotheses in measurement and design, subject selection and loss in randomized experiments, the use of evaluation to assess the validity of computer simulations, method variance, and time series experiments. Applied researchers who want to improve their research designs will find this book a compelling and thought-provoking read.