2 code implementations • 20 Dec 2023 • Max Goplerud, Omiros Papaspiliopoulos, Giacomo Zanella
We also provide generic results, which are of independent interest, relating the accuracy of variational inference to the convergence rate of the corresponding coordinate ascent variational inference (CAVI) algorithm for Gaussian targets.
no code implementations • 28 Mar 2019 • Angelos Alexopoulos, Petros Dellaportas, Omiros Papaspiliopoulos
We take a new look at the problem of disentangling the volatility and jumps processes of daily stock returns.
no code implementations • 26 Mar 2018 • Omiros Papaspiliopoulos, Gareth O. Roberts, Giacomo Zanella
We analyze the complexity of Gibbs samplers for inference in crossed random effect models used in modern analysis of variance.
no code implementations • 9 Mar 2018 • Victor Chen, Matthew M. Dunlop, Omiros Papaspiliopoulos, Andrew M. Stuart
One popular formulation of such problems is as Bayesian inverse problems, where a prior distribution is used to regularize inference on a high-dimensional latent state, typically a function or a field.
1 code implementation • 30 Oct 2016 • Michalis K. Titsias, Omiros Papaspiliopoulos
We introduce a new family of MCMC samplers that combine auxiliary variables, Gibbs sampling and Taylor expansions of the target density.
1 code implementation • 28 Aug 2007 • Omiros Papaspiliopoulos, Gareth O. Roberts, Martin Sköld
In this paper, we describe centering and noncentering methodology as complementary techniques for use in parametrization of broad classes of hierarchical models, with a view to the construction of effective MCMC algorithms for exploring posterior distributions from these models.
Methodology