Thomas H. Leonard Explained

Thomas H. Leonard
Birth Date:24 March 1948
Birth Place:Devon, England, UK
Death Place:Edinburgh, Scotland, UK
Alma Mater:Imperial College London
University College London
Doctoral Advisor:Dennis Lindley
Field:Statistics

Thomas Hoskyns Leonard (24 March 1948 – 18 December 2023) was a British statistician. He obtained a doctorate in Statistics at the University of London and worked at the University of Warwick and the University of Wisconsin-Madison, before taking up the Chair of Statistics at the University of Edinburgh in 1995.

In 1972, Leonard co-founded the Department of Statistics at the University of Warwick.[1] During Leonard's tenure (1980–1995) at the Department of Statistics at the University of Wisconsin-Madison,[2] [3] [4] he worked on improving the Bayesian components of both the teaching and research programs, alongside Kam Wah Tsui and Michael Newton.

Leonard published on the Bayesian approach to categorical data analysis, as well as on function smoothing and prior informative density estimation, conditional Laplacian approximations for marginal inference and prediction, and the statistical modelling of log covariance matrices. He also worked on the applications of Bayesian methodology in geophysics, medicine, and psychometrics. He was one of the founders, in 1992, of the International Society for Bayesian Analysis, alongside Arnold Zellner and Gordon Kaufman.[5] [6]

Leonard's books include A Course in Categorical Data Analysis[7] and Bayesian Methods: An Analysis for Statisticians and Interdisciplinary Researchers, the latter co-authored with his former doctoral student, John S. J. Hsu,[8] [9] At the University of Edinburgh, Leonard collaborated with Ian Main, Orestis Papasouliotis and others on publications in geophysics.[10] [11] He was also active during this period in the field of family medicine, contributing to articles on prevention of substance use disorders.[12] [13]

Alongside academic publications, he also appeared as an expert witness on statistics in multiple U.S. legal cases.

Leonard retired in 2001. He died on 18 December 2023.[14]

Notes and References

  1. Book: Zeeman . Christopher . Harrison . Jeff . Smith . Jim . 2004 . The Histories of Mathematics & Statistics at the University of Warwick . University of Warwick . 24.
  2. Web site: Wisconsin History, Dept of Statistics.
  3. Web site: UW Department of Statistics Celebrates 50 Years Amstat News. magazine.amstat.org. October 2010 . 2016-12-18.
  4. Web site: 50Th ANNIVERSARY DEPARTMENT OF STATISTICS University of Wisconsin.
  5. http://www.bayesian.org/history "ISBA History and Meetings"
  6. Ruiz . Diego Andres Perez . December 2016 . Interview: Thomas Leonard . The ISBA Bulletin . 23 . 4 . 11–20 . 24 December 2023.
  7. Book: Leonard, Thomas. A Course in Categorical Data Analysis. 1999-11-22. Chapman & Hall. London. 9781584881803. en.
  8. Book: Bayesian Methods: An Analysis for Statisticians and Interdisciplinary Researchers. Leonard. Thomas. Hsu. John S. J.. 2001-10-01. Cambridge University Press. Cambridge. 9780521004145. en.
  9. Web site: John S.J. Hsu. www.pstat.ucsb.edu. 2016-12-16.
  10. Main . Ian . Leonard . Thomas . Papasouliotis . Orestis . Hatton . C. G. . Meredith . Philip . September 1999 . One slope or two? Detecting statistically significant breaks of slope in geophysical data, with application to fracture scaling relationships . Geophysical Research Letters . 26 . 18 . 2801–2804 . 10.1029/1999GL005372 . 24 December 2023. free . 1999GeoRL..26.2801M .
  11. Main . Ian . Heffer . Kes . Papasouliotis . Orestis . Leonard . Thomas . Koutsabeloulis . N. C. . Zhang . X. . Li . Lungui . 2007 . The Statistical Reservoir Model: Calibrating faults and fractures, and predicting reservoir response to water flood . Geological Society, London, Special Publications . 292 . 1 . 469–482 . 10.1144/SP292.25 . 2007GSLSP.292..469M . 24 December 2023.
  12. Brown . Richard L. . Leonard . Thomas . Saunders . Laura A. . Papasouliotis . Orestis . February 1997 . A Two-Item Screening Test for Alcohol and Other Drug Problems . The Journal of Family Practice . 44 . 2 . 151–160 . 9040518 . 3 January 2024.
  13. Brown . Richard L. . Leonard . Thomas . Saunders . Laura A. . Papasouliotis . Orestis . January 1998 . The Prevalence and Detection of Substance Use Disorders among Inpatients Ages 18 to 49: An Opportunity for Prevention . Preventive Medicine . 10.1006/pmed.1997.0250 . 27 . 1 . 101–110 . 9465360 . 3 January 2024.
  14. Web site: 2024-01-16 . Tom Leonard (1948-2023) . 2024-01-17 . Department of Statistics . en-GB.

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