Biography:Chien-Pai Han

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Chien-Pai Han
Born(1936-12-17)December 17, 1936
DiedSeptember 1, 2020(2020-09-01) (aged 83)
Alma materHarvard University
Known forStatistical inference, Multivariate analysis, Discriminant analysis, Sample survey methods, Shrinkage estimation
Scientific career
FieldsStatistics
InstitutionsIowa State University, University of Texas at Arlington
Doctoral advisorArthur P. Dempster

Chien-Pai Han (December 17, 1936 - September 1, 2020) was an American statistician known for his contributions to statistical inference, multivariate analysis, discriminant analysis, and sample survey methodology.[1] Han was born in Hunan, China and grew up in Taiwan.[1] He earned his Ph.D. in Statistics from Harvard University in 1967,[2] where he studied under the supervision of Arthur P. Dempster.[2] Han held long-term faculty positions at Iowa State University (1967-1982) and the University of Texas at Arlington (1982-2017).[1]

Early life and education

Han was born on December 17, 1936.[1] He completed his Ph.D. in Statistics at Harvard University in 1967,[2] where his doctoral advisor was Arthur P. Dempster.[2] His dissertation was titled Testing the Homogeneity of a Set of Correlated Variances.[2]

Academic career

Iowa State University (1967-1982)

Han began his academic career at Iowa State University in 1967 as an associate professor in the Department of Statistics,[3] where he contributed to research and teaching in mathematical statistics.[1] During his tenure at Iowa State, he collaborated extensively with T. A. Bancroft.[4] He remained at Iowa State University for 15 years.[1]

University of Texas at Arlington (1982-2017)

Han joined the Department of Mathematics at the University of Texas at Arlington (UTA) in 1982,[1] where he became a central figure in developing the statistics program.[1] Over the course of his 35-year tenure at UTA, he supervised 20 Ph.D. students and 36 M.S. students,[1] and he was known for his mentorship of junior faculty and graduate students.[1] Han retired in 2017 and was named Professor Emeritus.[1][5]

Research contributions

Han's research contributions spanned multiple areas of statistical theory and methodology. His early work focused on discriminant analysis, particularly the distribution of discriminant functions when covariance matrices have special structures.[6] His work in this area provided important theoretical foundations for classification problems in multivariate analysis.

Han made significant contributions to survey sampling theory, including work on double sampling with partial information on auxiliary variables[3] and the efficiency of ratio estimators under different sampling schemes.[7] His research also addressed shrinkage estimation,[8] analysis of variance for incomplete models,[9] estimation in random effects models,[10] and central limit theorems for nonlinear statistics in repeated sampling from finite populations.[11]

Later in his career, Han worked on quality control and process capability indices,[1] computational statistics,[12] and applications of statistical methods to practical problems.

Han's work appeared in leading statistical journals including the Annals of Mathematical Statistics,[6] Annals of Statistics,[9] Journal of the American Statistical Association,[3] Annals of the Institute of Statistical Mathematics,[8] Metrika,[10] Computational Statistics & Data Analysis,[12] and the Journal of the Indian Statistical Association.[7]

Books and monographs

Books

This textbook, co-authored with T. A. Bancroft, covered fundamental principles of statistical theory and their applications to research problems.

Monograph-length technical works

  • C.-P. Han & D. L. Hawkins (1996). A Central Limit Theorem for Certain Nonlinear Statistics in Repeated Sampling of a Finite Population. Technical Report 312, University of Texas at Arlington.[11]

Selected publications

Early career (discriminant analysis)

  • C.-P. Han (1969). "Distribution of discriminant function when covariance matrices are proportional." Annals of Mathematical Statistics, 40(3), 979-985.[6]

Survey sampling and estimation

  • C.-P. Han (1968). "Double sampling with partial information on auxiliary variables." Journal of the American Statistical Association, 63(324), 1142-1151.[3]
  • P. Chandhok & C.-P. Han (1990). "On the efficiency of the ratio estimator under Midzuno scheme with measurement errors." Journal of the Indian Statistical Association, 28, 31-39.[7]

Analysis of variance and shrinkage estimation

  • C.-P. Han (1975). "Power of analysis of variance test procedures for incompletely specified fixed models." Annals of Statistics, 3(4), 797-808.[9]
  • D. L. Hawkins & C.-P. Han (1989). "A minimum average risk approach to shrinkage estimators of the normal mean." Annals of the Institute of Statistical Mathematics, 41(2), 347-363.[8]

Random effects models

  • P. Chiou & C.-P. Han (1996). "Estimation of error variance in one-way random model." Metrika, 44, 41-51.[10]

Computational statistics

  • Z. Li, Q. Li, C.-P. Han & B. Li (2014). "A hybrid approach for low-rank approximation of covariance matrices." Computational Statistics & Data Analysis, 79, 227-235.[12]

Technical reports

  • C.-P. Han & D. L. Hawkins (1996). Estimating Transition Probabilities from Aggregate Samples Augmented by Haphazard Recaptures II: The Case of Covariates. Technical Report 319, University of Texas at Arlington.[14]

Legacy

Han was remembered by colleagues and former students as a gentle, generous, and brilliant mentor who made significant contributions to the development of statistics at the University of Texas at Arlington.[1] His patient guidance and support helped shape the careers of numerous graduate students and junior faculty members over his 50-year academic career. He played a foundational role in building UTA's statistics program into a respected center for graduate education in mathematical statistics.[1] Han retired in 2017, after 35 tears of service to UTA, becoming professor emeritus. At the time, the campus newspaper The Shorthorn wrote a tribute to him. There the then mathematics chairperson Jianzhong Su was quoted about Han: "He has strong teaching qualities and has contributed to the Mathematics Department's ability to develop statistical research." Su added: "At UTA, he was probably the first research statistician hired and has some of the 'pioneering spirit' that makes him stand out."[15]

Death

Han died on September 1, 2020, following a long illness.[1][5] He was 83 years old.[16]

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 "Colleagues remember Chien-Pai Han as brilliant statistician, kind man". University of Texas at Arlington. August 2, 2021. https://www.uta.edu/academics/schools-colleges/science/news/2021/08/02/colleagues-remember-chien-pai-han-as-brilliant-statistician-kind-and-caring-friend. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 "Harvard University PhD Mathematics Dissertations 1960-1969". Harvard University. https://guides.library.harvard.edu/mathematics/dissertations. 
  3. ↑ 3.0 3.1 3.2 3.3 Han, Chien-Pai (1968). "Double Sampling with Partial Information on Auxiliary Variables". Journal of the American Statistical Association 63 (324): 1142–1151. 
  4. ↑ 4.0 4.1 Bancroft, T. A.; Han, Chien-Pai (1981). Statistical Theory and Inference in Research. New York: Marcel Dekker. ISBN 0-8247-1400-8. 
  5. ↑ 5.0 5.1 "In Memoriam". University of Texas at Arlington. https://resources.uta.edu/hr/services/retirees-club/in-memoriam.php. 
  6. ↑ 6.0 6.1 6.2 Han, Chien-Pai (1969). "Distribution of Discriminant Function When Covariance Matrices are Proportional". Annals of Mathematical Statistics 40 (3): 979–985. doi:10.1214/aoms/1177697601. 
  7. ↑ 7.0 7.1 7.2 Chandhok, P.; Han, Chien-Pai (1990). "On the Efficiency of the Ratio Estimator Under Midzuno Scheme With Measurement Errors". Journal of the Indian Statistical Association 28: 31–39. 
  8. ↑ 8.0 8.1 8.2 Hawkins, D. L.; Han, Chien-Pai (1989). "A minimum average risk approach to shrinkage estimators of the normal mean". Annals of the Institute of Statistical Mathematics 41 (2): 347–363. doi:10.1007/BF00050668. 
  9. ↑ 9.0 9.1 9.2 Han, Chien-Pai (1975). "Power of Analysis of Variance Test Procedures for Incompletely Specified Fixed Models". Annals of Statistics 3 (4): 797–808. doi:10.1214/aos/1176343189. 
  10. ↑ 10.0 10.1 10.2 {{cite journal |last1=Chiou |first1=P. |last2=Han |first2=Chien-Pai |title=Estimation of error variance in one-way random model |journal=Metrika |volume=44 |pages=41-51 |year=1996 |doi=10.1007/BF02717092}}
  11. ↑ 11.0 11.1 Han, Chien-Pai; Hawkins, D. L. (1996). A Central Limit Theorem for Certain Nonlinear Statistics in Repeated Sampling of a Finite Population (Technical report). University of Texas at Arlington. 312.
  12. ↑ 12.0 12.1 12.2 Li, Z.; Li, Q.; Han, Chien-Pai; Li, B. (2014). "A hybrid approach for low-rank approximation of covariance matrices". Computational Statistics & Data Analysis 79: 227–235. doi:10.1016/j.csda.2014.05.015. https://cris.maastrichtuniversity.nl/en/publications/9450a095-8a82-4eab-b0dc-29329a6d2835. 
  13. ↑ Reviews of Statistical Theory and Inference in Research:
    • Yu, Kai F. (March–April 1984), "none", American Scientist 72 (2): 212 
    • Currie, I.D. (December 1982), "none", Biometrics 38 (4): 1122, doi:10.2307/2529899 
    • Read, K. (1983), "none", Journal of the Royal Statistical Society, Series A 146 (1): 90, doi:10.2307/2981495 
  14. ↑ Han, Chien-Pai; Hawkins, D. L. (1996). Estimating Transition Probabilities from Aggregate Samples Augmented by Haphazard Recaptures II: The Case of Covariates (Technical report). University of Texas at Arlington. 319.
  15. ↑ https://www.theshorthorn.com/news/mathematics-professor-retires-after-35-years-at uta/article_6665ede2-d955-11e7-980e-5bdc240c13bc.html
  16. ↑ "Chien Pai Han Obituary". Dignity Memorial. https://www.dignitymemorial.com/obituaries/houston-tx/chien-han-9346532. 



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