I am a postdoctoral researcher in Statistics, Probability and Stochastic Processes, currently affiliated with the Okinawa Institute of Science and Technology in Japan. Before, I completed my PhD from the University of Warwick (UK) in 2024 and was a Research Fellow at the University of Birmingham (UK) 2024-2025.
I am interested in statistical modelling, inference and estimation, especially for dependent and discontinuous data. In particular, I am interested in questions relating to Markov chains, Markov processes and Stochastic Processes more widely.
I am currently working on error bounds and sample complexity for statistical estimation and mixing theory for classes of “structured” Markov chains.
RESEARCH
Judd, N. A. and Esposito, A. R. On the Impossibility of Estimating the Average Mixing Time. October 2026. arXiv: 2610.10860 [math.ST]. http://arxiv.org/abs/2610.10860
Judd, N. A. and Spanò, D. Subordinated Wright-Fisher priors. April 2026. arXiv: 2604.11363 [math.ST]. https://arxiv.org/abs/2604.11363
Judd, N. A. et al. Statistical Crime Linkage: Evaluating approaches within the Covenant for Using AI in Policing. October 2025. arXiv: 2510.03730 [stat.AP]. https://arxiv.org/abs/2510.03730
Judd, N. A. et al. Forecasting hourly foodservice sales during geopolitical and economical disruption using zero-inflated mixed effects models. Journal of Applied Statistics 53, 372–390. eprint: https://doi.org/10.1080/02664763.2025.2519136. (2026)
Marsh, J., Judd, N. A., Chan, L. and Seymour, R. G. Neural Methods for Multiple Systems Estimation Models. January 2026. arXiv: 2601.05859 [stat.AP]
PhD THESIS
On Non-Diffusive Wright–Fisher Processes . N. A. Judd (2024, University of Warwick). http://wrap.warwick.ac.uk/191972
