Paul

McNicholas


He/Him/His


Canada Research Chair in Computational Statistics


Professor & Associate Chair (Statistics), Deptartment of Mathematics and Statistics, McMaster University 


Editor-in-Chief, Journal of Classification


Note for those interested in joining my team: I receive many emails from people interested in joining my team. Given the volume, I cannot respond to most. If I do not respond, please do not be offended and please do not send follow-up emails.

Paul McNicholas

About


My research involves the development and implementation of statistical methods, especially those that are highly dependent on computation. My principal area of interest is mixture model-based clustering and recent work includes the development of approaches for higher-order data, mixed-type data, and multivariate longitudinal data. I have a special interest in autism and aging, respectively. 

Education (Trinity College Dublin)

Sc.D. in Statistics

Ph.D. in Statistics

M.Sc. in High Performance Computing

B.A./M.A. in Mathematics


Work Experience (McMaster University)

Professor, Mathematics & Statistics, 2014-present

Associate Chair (Statistics), 2021-2023

Director, MacData Institute, 2017-2022


Curriculum Vitae (March 2026)

Autism & Communications Disabilities 

Toronto Star Op-Ed, 2023


Selected Honours & Awards

Dorothy Killam Fellowship, 2023

John. L. Synge Award, Royal Society of Canada, 2021

Steacie Prize for the Natural Sciences, 2020

E.W.R Steacie Memorial Fellowship, May 2019

College Member, Royal Society of Canada, 2017

University Scholar, 2017

Tier 1 Canada Research Chair, 2015

Team

Dilushika Anton Michael
Jean Li
Yicen Li
Mackenzie Neal

Dilushika Anton Michael

M.Sc. Student

Jean Li

Ph.D. Student

Yicen Li

Postdoctoral Fellow

Mackenzie Neal

Ph.D. Candidate

Nicholas Richardson
Cameron Roopnarine
Alexa Sochaniwsky
Siyi Wang

Nicholas Richardson 

Postdoctoral Fellow

Cameron Roopnarine

Ph.D. Candidate

Alexa Sochaniwsky

Ph.D. Candidate

Siyi Wang

Postdoctoral Fellow

Yasmin Yaacoub

Yasmin Yaacoub

M.Sc. Student

Output

Selected publications are given below. Click here to see all my publications.

Monographs
McNicholas, P.D. and Tait, P.A. (2019), Data Science with Julia. Boca Raton: Chapman & Hall/CRC Press. [webpage]

McNicholas, P.D. (2016), Mixture Model-Based Classification. Boca Raton: Chapman & Hall/CRC Press. [webpage]

Forthcoming & Recently Published Contributions (Last 10)
Neal, M.R. and McNicholas, P.D. ‘Parsimonious hidden Markov models for multivariate longitudinal data’, Journal of Classification. To appear. [doi]

Pocuca, N., Gallaugher, M.P.B. and McNicholas, P.D. (2026), ‘Modelling Shanghai soil properties with finite mixtures of SU Johnson distributions’, Computational Statistics. 41, 69. [doi]

Cui, X., Murphy, O.A. and McNicholas, P.D. (2026), ‘Copula-based mixtures of regression models for multivariate response data’, Computational Statistics and Data Analysis 218, 108340. [doi]

Beauchamp, M., Kirkwood, R., Cooper, C., McIlroy, W.E., Van Ooteghem, K., Beyer, K.B., Richardson, J., Kuspinar, A.,  McNicholas, P.D. et al. (2025), ‘Cohort profile: baseline characteristics and design of the McMaster Monitoring My Mobility (MacM3) study – a prospective digital mobility cohort of community-dwelling older Canadians from Southern Ontario’, BMJ Open 15(10), e105223. [doi]

Payne A., Silva A., Rothstein S.J., McNicholas P.D. and Subedi S. (2025), ‘Finite mixtures of multivariate Poisson-log normal factor analyzers for clustering count data’, Statistics and Computing 35, 189. [doi]

Zhang, X., Murphy, O.A. and McNicholas, P.D. (2025), ‘Unbalanced multivariate longitudinal data clustering with a copula kernel mixture model’, Statistics and Computing 35, 126. [doi]

Alamer, E.M.S.,  Gallaugher, M.P.B. and McNicholas, P.D. (2025), ‘A mixture model for skewed mixed-type data’, Statistics and Probability Letters 226, 110507. [doi]

Sochaniwsky, A.A., Gallaugher, M.P.B., Tang, Y. and McNicholas, P.D. (2025), ‘Flexible clustering with a sparse mixture of generalized hyperbolic distributions’, Journal of Classification 42(1), 113-133. [doi]

Zhang, X., Murphy, O.A. and McNicholas, P.D. (2025), ‘Balanced longitudinal data clustering with a copula kernel mixture model’, Canadian Journal of Statistics 53(1), e11838. [doi]

Neal, M.R., Sochaniwsky, A.A., and McNicholas, P.D. (2024), ‘Hidden Markov models for multivariate panel data’, Statistics and Computing 34, 182 . [doi]

Software: Recently Published or Updated
Andrews, J.L., Neal, M.R., and McNicholas, P.D. (2025). vscc: Variable selection for clustering and classification. R package version 0.8.

Clark, K.M. and McNicholas, P.D. (2025), oclust: Gaussian model-based clustering with outliers. R package version 1.0.0.

Zaccaria, G., Cavicchia, C., Balzotti, L., Sochaniwsky, A.A. and McNicholas, P.D. (2025). PUGMM: Parsimonious ultrametric Gaussian mixture models. R package version 0.1.2.

Pocuca, N., Browne, R.P., Sochaniwsky, A.A. and McNicholas, P.D. (2025). mixture: Mixture models for clustering and classification. R package version 2.1.2.

McNicholas, P.D., ElSherbiny, A., Jampani, K.R., McDaid, A.F., Murphy, T.B. and Banks, L. (2025). pgmm: Parsimonious Gaussian mixture models. R package version 1.2.8.