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math.ST2024
Non-standard boundary behaviour in two-component mixture models
Heather Battey, Peter McCullagh, Daniel Xiang
Consider a binary mixture model of the form , where is standard Gaussian and is a completely specified heavy-tailed distribution with the same sup…
math.ST2024
Regression graphs and sparsity-inducing reparametrizations
Jakub Rybak, Heather Battey, Karthik Bharath
That parametrization and sparsity are inherently linked raises the possibility that relevant models, not obviously sparse in their natural formulation, exhibit a population-level s…
math.ST2024
On the role of parametrization in models with a misspecified nuisance component
Heather Battey, Nancy Reid
The paper is concerned with inference for a parameter of interest in models that share a common interpretation for that parameter but that may differ appreciably in other respects.…