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• W2607281807 abstract "Fitting stochastic kinetic models represented by Markov jump processes within the Bayesian paradigm is complicated by the intractability of the observed-data likelihood. There has therefore been considerable attention given to the design of pseudo-marginal Markov chain Monte Carlo algorithms for such models. However, these methods are typically computationally intensive, often require careful tuning and must be restarted from scratch upon receipt of new observations. Sequential Monte Carlo (SMC) methods on the other hand aim to efficiently reuse posterior samples at each time point. Despite their appeal, applying SMC schemes in scenarios with both dynamic states and static parameters is made difficult by the problem of particle degeneracy. A principled approach for overcoming this problem is to move each parameter particle through a Metropolis-Hastings kernel that leaves the target invariant. This rejuvenation step is key to a recently proposed $$hbox {SMC}^2$$ algorithm, which can be seen as the pseudo-marginal analogue of an idealised scheme known as iterated batch importance sampling. Computing the parameter weights in $$hbox {SMC}^2$$ requires running a particle filter over dynamic states to unbiasedly estimate the intractable observed-data likelihood up to the current time point. In this paper, we propose to use an auxiliary particle filter inside the $$hbox {SMC}^2$$ scheme. Our method uses two recently proposed constructs for sampling conditioned jump processes, and we find that the resulting inference schemes typically require fewer state particles than when using a simple bootstrap filter. Using two applications, we compare the performance of the proposed approach with various competing methods, including two global MCMC schemes." @default.
• W2607281807 created "2017-04-28" @default.
• W2607281807 creator A5021773740 @default.
• W2607281807 creator A5091549401 @default.
• W2607281807 date "2017-11-10" @default.
• W2607281807 modified "2023-09-24" @default.
• W2607281807 title "Efficient $$hbox {SMC}^2$$ SMC 2 schemes for stochastic kinetic models" @default.
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• W2607281807 doi "https://doi.org/10.1007/s11222-017-9789-8" @default.
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