THIS ISSUE
Design and Analysis of Longitudinal Studies
Robert D. Gibbons, PhD, is Director of the Center for Health Statistics, Professor of Biostatistics and Psychiatry, University of Illinois at Chicago.
This issue is dedicated to the fond memory of Sam Greenhouse. Sam Greenhouse was Professor Emeritus at George Washington University. He established the first Biometry Division at the National Institute of Health, and was Chief of the Theoretical Statistics and Mathematics Section of the National Institute of Mental Health. He received numerous prestigious awards throughout his remarkably productive career, including the American Statistical Association's Founders Award, and the Harvard Award for lifetime contributions to Psychiatric Epidemiology and Biostatistics. While a visiting professor at Stanford, his excellent teaching convinced a young mathematics student, Brad Efron, to pursue a career in statistics.
Dr. Gibbons received his doctorate in statistics and psy-chometrics from the University of Chicago in 1981. He has spent his entire career at the University of Illinois at Chicago (1981-present) where he directs the Center for Health Statistics, a consortium of 15 statisticians working in both theoretical and applied areas of environmet-rics, chemometrics, biometrics, and psychomet-rics. Support for his research includes numerous grants and contracts from the National Institutes of Health (NIH), National Institute of Mental Health (NIMH), Office of Naval Research (ONR), National Cancer Institutes (NCI), and MacArthur foundation. Recognition for his work includes a Young Scientist Award from the ONR, Research Scientist Award from NIH, the Harvard Award for lifetime contributions to psychiatric epidemiology and biostatistics, the Lucaks award for contributions to environmental statistics in the 20th century, and two Youden prizes (2001 and 2006) from the American Statistical Associations for statistical contributions to the field of chemistry. Dr. Gibbons is a Fellow of the American Statistical Association and a member of the Institute of Medicine of the National Academy of Sciences. He has authored more than 180 peer-reviewed scientific papers and four books. His latest book, Longitudinal Data Analysis, with Don Hedeker, has recently been published by John Wiley and Sons.

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