Rockville Institute Affiliates in
Statistical Analysis & Modeling

Frank Jenkins, PhD
David Marker, PhD
Debra J. Rog, PhD
David Wright, PhD

Frank Jenkins, PhD, is a senior statistician who is involved in psychometric and hierarchical linear modeling analyses projects. As a research scientist at the Educational Testing Service (ETS), he directed the analysis of mathematics, geography, and writing assessments for the National Assessment of Educational Progress. Dr. Jenkins' primary research interests include multilevel linear models and flexible Bayesian measurement models. He has consulted on research projects in a variety of educational and methodological settings.
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David Marker, PhD, is a senior statistician with expertise in project management, quality control and improvement, survey research, sampling, survey evaluation, data analysis, imputation, modeling, and small area statistics. Dr. Marker has worked on studies in the fields of health, the environment, education, housing, energy, social services, insurance, and transportation, as well as in the commercial sector. He has also appeared as an expert witness before Federal, state, and local governments. Dr. Marker has worked on studies in the area of quality control and improvement for the U.S. Department of Education, the Energy Information Administration, and the U.S. Environmental Protection Agency. He is an internationally recognized consultant in total quality management, having been invited to conduct training sessions for the Swedish, Norwegian, and Finnish governments on improving the quality of their data collection activities. He has also conducted audits of statistical offices in South Africa, Denmark, and The Netherlands. Dr. Marker is also a member of the Board of Directors of the American Statistical Association and Chair of its Scientific and Public Affairs Advisory Committee.
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Debra J. Rog, PhD, President of the Rockville Institute, is an internationally recognized expert in evaluation and applied social research methodology, homelessness, housing, and mental health. She has directed numerous multisite research and evaluation projects in the areas of poverty, homelessness, housing for vulnerable populations, violence and trauma prevention, and mental health services. She has provided methodological and subject-matter expertise for research funded by clients such as the Robert Wood Johnson Foundation, the Center for Mental Health Services, the U.S. Department of Housing and Urban Development, the United Nations, and the Bill and Melinda Gates Foundation, among others. Dr. Rog has published and presented widely, and is an editor of numerous books, series, and journals. She is on the faculty of The Evaluators' Institute and was the 2009 President of the American Evaluation Association. DebraRog@RockvilleInstitute.org
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David Wright, PhD, is a senior biostatistician with experience in clinical trials, sample design, multivariate analysis, epidemiologic modeling, and industrial consulting. His experience spans all aspects of clinical trials, from protocol development and analysis plans to statistical programming and writing for publications. Dr. Wright's work also encompasses research issues that are not strictly statistical, such as data management and total quality management. Among his past work are projects to design and analyze national surveys and to apply generalized estimating equation models for analysis of clinical trials. Nonparametric methods, experimental design, survival analysis, modeling of longitudinal data, and operations research are among Dr. Wright's areas of specialization.
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