Tom Krenzke

Vice President

Tom Krenzke has extensive experience in survey sampling and estimation techniques, and has led research in statistical confidentiality, sample design, non-probability sampling, small area estimation, variance estimation, imputation, and nonresponse bias. Prior to joining Westat, Mr. Krenzke worked at the U.S. Census Bureau.

Mr. Krenzke is a Fellow of the American Statistical Association (ASA) and has held several positions in ASA, including chair of the ASA Committee on Privacy and Confidentiality and program chair of the Survey Research Methods Section. He has also served as President of the Washington Statistical Society. He leads Westat’s Steering Committee on WesDaX® (Westat’s real-time online table generator) and Westat’s Confidentiality Work Group and serves on the Westat Institutional Review Board.

In recognition of his contributions to the field, Mr. Krenzke 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.


  • M.S., Applied Statistics, Bowling Green State University
  • B.A., Mathematics, Winona State University

Areas of Expertise

Selected Publications

Li J. and Krenzke T. (2021).

A proposed 'bottom-up' differential privacy approach for disclosure prevention in data query tool.

Krenzke T. and Li J. (2021).

Data protection toolkit’s playbook as demonstrated through the PIAAC Prison Study.

Li J., Li L., Krenzke T., and Chang W.-Y. (2021).

An approach to estimate the reidentification risk in longitudinal survey microdata.

Kali J., Krenzke T., Chen Y., Chen J.A., and Green J. (2021).

Evaluation of methods to form segments from Census blocks in area sample designs.

Ren W., Li J., Erciulescu A., Krenzke T., and Mohadjer L. (2020).

A variable selection method for small area estimation modeling of the proficiency of adult competency.

Van de Kerchkove W., Krenzke T., and Mohadjer L. (2020).

Addressing outcome-related nonresponse through a doorstep interview.

Krenzke T. and Mohadjer L. (2020).

Application of probability-based link-tracing and nonprobability approaches to sampling out-of-school youth in developing countries.

Krenzke T., Mohadjer L., Li J., Erciulescu A.L., Fay R., Ren W., Van de Kerchkove W., Li L., and Rao J.N.K. (2020).

Program for the International Assessment of Adult Competencies. State and county estimation methodology report.

Li L., Krenzke T., and Shlomo N. (2019).

Re-examining file-level re-identification risk assessment for survey microdata.

Krenzke T., Van de Kerchkove W., Thornton N., Diaz-Hoffmann L., Hogan J., Mohadjer L., Li L., Li J., Yamamoto K., Khorramdel L., and Ali U. (2019).

U.S. Program for the International Assessment of Adult Competencies (PIAAC) 2012/2014/2017: Main Study, National Supplement, and PIAAC 2017 technical report.

Van de Kerchkove W., Krenzke T., Mohadjer L., and Ren W. (2019).

Evaluation of dwelling unit frame coverage enhancement: Case study of the 2017 PIAAC Survey.

Shlomo N., Krenzke T., and Li J. (2019).

Comparison of three post-tabular confidentiality approaches for survey weighted frequency tables.

Krenzke T. and Li J. (2019).

Replicating published data tables to assess sensitivity in subsequent analyses and mapping.

Li J., Krenzke T., Mohadjer L., Van de Kerchkove W., Li L., Ren W., and Adbaru H.H. (2018).

Choice of small area models based on sample designs and availability of auxiliary data in PIAAC Study.

Krenzke T., Li J., and McKenna L. (2017).

Producing multiple tables for small areas with confidentiality protection.

Rampey B.D., Keiper S., Mohadjer L., Krenzke T., Li J., Thornton N., Hogan J., Xie H., and Provasnik S. (2016).

Highlights from the U.S. PIAAC Survey of Incarcerated Adults: Their skills, work experience, education, and training.

Rampey B., Finnegan R., Goodman M., Mohadjer L., Krenzke T., Hogan J., and Provasnik S. (2016).

Skills of the U.S. unemployed, young, and older adults in sharper focus: Results from the Program for the International Assessment of Adult Competencies (PIAAC) 2012/2014: First look.

Roey S., Krenzke T., and Perkins R. (2015).

O privacy, where art thou?: Can 'dirty' data be your friend? Considering the impact on disclosure risk as illustrated in the education data context.

Van de Kerchkove W., Mohadjer L., and Krenzke T. (2014).

A weight trimming approach to achieve a comparable increase to bias across countries in the Programme for the International Assessment of Adult Competencies.

Krenzke T., Li L., and Li J. (2014).

An evaluation of the impact of missing data on disclosure risk measures.

Li L., Krenzke T., and Mohadjer L. (2014).

Considerations for selection and release of reserve samples for in-person surveys.

Krenzke T., Diallo M.S., Hubbell K., Gopinath A., and Chen S. (2014).

Data coarsening and data swapping algorithms.

Li J., Chen S., Krenzke T., and Mohadjer L. (2014).

Replication variance estimation for balanced sampling: An application to the PIAAC Study.

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