Jean Opsomer

Vice President

Jean Opsomer, Ph.D., is a senior statistician with extensive experience applying statistical methods to answer research questions. He is responsible for the statistical and survey methodology of several large-scale survey projects.

Dr. Opsomer was a professor and chair of the Department of Statistics at Colorado State University, which he joined in 2007. His recent research has focused on the introduction of shape-constrained and nonparametric methods in survey estimation and on several interdisciplinary projects with survey components on a range of topics (higher education, public health, nutrition, employment, fisheries management, methane emissions, forest health, and agricultural erosion).

Previously, Dr. Opsomer spent 12 years at Iowa State University as a faculty member in the Department of Statistics, affiliated with the Center for Survey Statistics and Methodology. The author or coauthor of 65 peer-reviewed articles, he has introduced a number of influential novel statistical methodologies into survey estimation. His methodological and theoretical work is frequently motivated by questions that arise within federal statistical agencies with which he has long-term collaborations.

Dr. Opsomer is a Fellow of the American Statistical Association (ASA) and the Institute of Mathematical Statistics and an Elected Member of the International Statistical Institute. In recognition of his contributions to the field, Dr. Opsomer has been named a Westat Senior Statistical Fellow and serves on the Statistical Fellows Committee, which provides consultation on important survey statistics issues and addresses recent advances in applied statistics.


Ph.D., Operations Research , Cornell University
M.B.A., Finance, University of Chicago
M.S., Management Engineering, Katholieke Universiteit Leuven, Belgium

Areas of Expertise

Selected Publications

Ma H., Ogawa T.K., Sminkey T.R., Breidt F.J., Lesser V.M., Opsomer J.D., Foster J.R., and Van Voorhees D.A. (2018).

Pilot surveys to improve monitoring of marine recreational fisheries in Hawaii.

Breidt F.J. and Opsomer J.D. (2017).

Model-assisted survey estimation with modern prediction techniques.

Wu J., Meyer M.C., and Opsomer J.D. (2016).

Survey estimation of domain means that respect natural orderings.

Hernandez-Stumpfhauser D., Breidt F.J., and Opsomer J.D. (2016).

Hierarchical Bayesian small area estimation for circular data.

Breidt F.J., Opsomer J.D., and Sanchez-Borrego I. (2016).

Nonparametric variance estimation under fine stratification: An alternative to collapsed strata.

Opsomer J.D., Breidt F.J., White M., and Li Y. (2016).

Successive difference replication variance estimation in two-phase sampling.

Ranalli M.G., Breidt F.J., and Opsomer J.D. (2016).

Nonparametric regression methods for small area estimation.

Hernandez-Stumpfhauser D., Breidt F.J., and Opsomer J.D. (2016).

Variational approximations for selecting hierarchical models of circular data in a small area estimation application.

Ma H., Ogawa T.K., Breidt F.J., Lesser V.M., Opsomer J.D., Sminkey T.R., Hawkins C., Bagwill A., and Van Voorhees D.A. (2016).

Pilot surveys of shore fishing on Oahu, Hawaii.

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