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Bayesian Computation through Geometric and Variance Reduction Methods.

Grant number: 16/21137-2
Support Opportunities:Regular Research Grants
Start date: February 01, 2017
End date: January 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Probability and Statistics - Statistics
Principal Investigator:Ricardo Sandes Ehlers
Grantee:Ricardo Sandes Ehlers
Host Institution: Instituto de Ciências Matemáticas e de Computação (ICMC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

This project aims at developing and apply computationally intensive methods which explore the geometry of the posterior distributions in the parameter spaces of statistical models under a Bayesian approach. We thus seek to improve the efficiency of MCMC methods in Bayesian computation since such strategies in general lead to convergence of the Markov chains with fewer iteration. These ideas will be combined with variance reduction techniques in Monte Carlo estimators. Since the computational costs per iteration involved are higher the cost-benefit will be investigated through simulation studies and real data analyses. We hope to provide empirical evidence that such methods are justified in practical applications so that the expected increased computational cost is compensated by a more efficient exploration of the posterior distribution. (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DANILEVICZ, IAN M.; EHLERS, RICARDO S.. Bayesian influence diagnostics using normalized functional Bregman divergence. COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, . (16/21137-2)
DANILEVICZ, IAN M.; EHLERS, RICARDO S.. Bayesian influence diagnostics using normalized functional Bregman divergence. COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, v. 51, n. 6, p. 16-pg., . (16/21137-2)