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Optimal scaling of random-walk Metropolis algorithms using Bayesian large-sample asymptotics. (arXiv:2104.06384v3 [stat.ME] UPDATED)
Feb. 16, 2022, 2:10 a.m. | Sebastian M Schmon, Philippe Gagnon
stat.ML updates on arXiv.org arxiv.org
High-dimensional limit theorems have been shown useful to derive tuning rules
for finding the optimal scaling in random-walk Metropolis algorithms. The
assumptions under which weak convergence results are proved are however
restrictive: the target density is typically assumed to be of a product form.
Users may thus doubt the validity of such tuning rules in practical
applications. In this paper, we shed some light on optimal-scaling problems
from a different perspective, namely a large-sample one. This allows to prove
weak …
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