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• W3101950489 abstract "The partially collapsed Gibbs (PCG) sampler offers a new strategy for improving the convergence of a Gibbs sampler. PCG achieves faster convergence by reducing the conditioning in some of the draws of its parent Gibbs sampler. Although this can significantly improve convergence, care must be taken to ensure that the stationary distribution is preserved. The conditional distributions sampled in a PCG sampler may be incompatible and permuting their order may upset the stationary distribution of the chain. Extra care must be taken when Metropolis-Hastings (MH) updates are used in some or all of the updates. Reducing the conditioning in an MH within Gibbs sampler can change the stationary distribution, even when the PCG sampler would work perfectly if MH were not used. In fact, a number of samplers of this sort that have been advocated in the literature do not actually have the target stationary distributions. In this article, we illustrate the challenges that may arise when using MH within a PCG sampler and develop a general strategy for using such updates while maintaining the desired stationary distribution. Theoretical arguments provide guidance when choosing between different MH within PCG sampling schemes. Finally, we illustrate the MH within PCG sampler and its computational advantage using several examples from our applied work." @default.
• W3101950489 created "2020-11-23" @default.
• W3101950489 creator A5027041190 @default.
• W3101950489 creator A5038831857 @default.
• W3101950489 date "2015-04-03" @default.
• W3101950489 modified "2023-10-15" @default.
• W3101950489 title "Metropolis-Hastings Within Partially Collapsed Gibbs Samplers" @default.
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• W3101950489 doi "https://doi.org/10.1080/10618600.2014.930041" @default.
• W3101950489 hasPublicationYear "2015" @default.
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