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Cross Design Synthesis: A New Strategy for Medical Effectiveness Research, by US General Accounting Office (GAO/PEMD-92-19), 121 pp, paper, 2, Washington, DC, US General Accounting Office, 1992. Meta-analysis has generally been accepted as a valid method to address certain clinical questions that are evaluated in clinical trials. A number of researchers are expanding the scope and depth of this technique through such approaches as cumulative meta-analysis, in which the technique is repeated after each new clinical trial of a certain type is completed until the resulting effect reaches a predetermined level of significance. Meta-Analysis for Explanation: A Casebookis a recent book with eight authors, as well as four other chapter contributors. Nonetheless, the eight have created a book of great depth, which is essential reading for people interested in how this methodology may be used. This book will be of greatest interest to researchers in the social sciences, in which
Bert Spilker (Wed,) studied this question.