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Dr. Duane L. Steffey is a Senior Managing Scientist and the Practice Director of Exponent's Data/Risk Analysis practice. His research investigations have involved the development of statistical methods for meta-analysis particularly through Bayesian hierarchical modeling and the applications of statistics to problems in public policy. Dr. Steffey's interdisciplinary work has covered such diverse areas as transportation energy the environment public health medicine education and national defense. His recent applied research has concerned the design and analysis of engineering and scientific experiments sample surveys and observational studies. Dr. Steffey has assisted clients in evaluating product performance using data on field incidents and exposure. He has also served as an expert witness conducting research and providing testimony in deposition and trial in civil cases involving construction defects fraud labor disputes and workers� compensation. | 