Efficient Particle Smoothing for Bayesian Inference in Dynamic Survival Models
Abstract
This article proposes an efficient Bayesian inference for piecewise exponential hazard (PEH) models, which allow the effect of a covariate on the survival time to vary over time. The proposed inference methodology is based on a particle smoothing (PS) algorithm that depends on three particle filters. Efficient proposal (importance) distributions for the particle filters tailored to the nature of survival data and PEH models are developed using the Laplace approximation of the posterior distribution and linear Bayes theory. The algorithm is applied to both simulated and real data, and the results show that it generates an effective sample size that is more than two orders of magnitude larger than a state-of-the-art MCMC sampler for the same computing time, and scales well in high-dimensional and relatively large data.
Cite
@article{arxiv.1806.07048,
title = {Efficient Particle Smoothing for Bayesian Inference in Dynamic Survival Models},
author = {Parfait Munezero},
journal= {arXiv preprint arXiv:1806.07048},
year = {2020}
}
Comments
The title of the paper has been changed to reflect the content. The new version adds on the existing version the following 1) A particle smoothing inference methodology. 2) A simulation study of assessing the efficiency of the proposed inference methodology. 3) A comparison of the proposed methodology with a state-of-the-art MCMC inference methodology