Rockville Institute Affiliates in
Sample Design & Estimation
J. Michael Brick, PhD
David Judkins, MA
Graham Kalton, PhD
David Marker, PhD
Leyla Mohadjer, PhD
David Morganstein, MA
J. Michael Brick, PhD, is a senior statistician with special expertise
in sample design and estimation for large surveys, the theory and practice of
telephone surveys, survey quality control and the techniques of total quality management,
nonresponse and bias evaluation, and survey methodology. Dr. Brick has
contributed to the statistical and substantive aspects of numerous studies and
to statistical methodology research in several areas, including education,
transportation, and health studies. Dr. Brick is a Fellow of the American
Statistical Association, an elected member of the International Statistical
Institute, and a research professor in the Joint Program in Survey Methodology
at the University of Maryland.
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David Judkins, MA, is a senior statistician with expertise in the
design of sample surveys and the development of sample survey estimates and
their variances. He was director of statistics for an evaluation of the Office
of National Drug Control Policy's National Youth Anti-Drug Media Campaign where
he developed both the sample design and the complex weighting system needed to
produce survey estimates of both cross-sectional and longitudinal
characteristics. He has taken a lead role in developing systems for imputation
of partial questionnaires, nonresponse adjustment, propensity scoring for
casual inference from observational studies, variance estimation, and table
preparation. He is an expert in multilevel modeling, survival analysis,
small-area estimation, and sample design and estimation and an experienced
manager of multidisciplinary teams.
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Graham Kalton, PhD, is a senior
statistician. He has served as a research scientist in the Survey Research Center of the
University of Michigan and served a term as chairman of the Department of
Biostatistics. Dr. Kalton has conducted research on many aspects of survey
methodology and has been a consultant on a number of Federal statistical
programs. He served on the Committee for National Statistics (CNSTAT) of the National
Academy of Sciences for 6 years and has served on several CNSTAT panels. In
addition, he has been involved with many international statistical activities
and has served as president of the International Association of Survey
Statisticians. Dr. Kalton is a Fellow of the American Statistical Association
and a National Associate of the National Academies.
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David Marker, PhD, is a senior
statistician with experience in quality control and improvement, survey
research, sampling, survey evaluation, data analysis, imputation, modeling, and
small area estimation. He 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 has also
worked on other studies in the fields of health, housing, energy, social
services, transportation, terrorism, and the environment, as well as in the
commercial sector. Dr. Marker 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 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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Leyla Mohadjer, PhD, a senior
statistician, has special areas of expertise in sample design, estimation,
analysis of variance, and regression models for survey data. She has directed
the sampling and estimation for large-scale projects such as the National
Health and Nutrition Examination Survey. She has been responsible for sample
design and selection, sample weighting, estimation, disclosure risk limitation,
and nonresponse bias analysis. Dr. Mohadjer has contributed to the development
of regression models for WesVar, which is software for the analysis of data
from complex sample surveys. She served as editor for the newsletter of the
International Association of Sampling Statisticians.
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David Morganstein, MA, is a senior statistician with special areas of
expertise in the design and application of sample surveys and systems of evaluation,
quality control, statistical analysis, and estimation and quantification.
He was co-developer of WesVar, which is software for estimating sampling errors from
complex sample designs. Mr. Morganstein has worked with more than 50 organizations in
North America and overseas in the teaching and use of statistical methods for quality
assurance and improvement. Mr. Morganstein is a Fellow of the American Statistical Association
and has been active in this and other statistical associations; he has presented workshops and
held several appointed roles, serving as chairperson of various committees and
as a member of the board of directors. He is an elected member of the International Statistical
Institute and an instructor in the Joint Program for Survey Methods at the University of Maryland.
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