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Moderate deviations-based importance sampling for stochastic recursive equations

Published online by Cambridge University Press:  17 November 2017

Paul Dupuis*
Affiliation:
Brown University
Dane Johnson*
Affiliation:
University of North Carolina at Chapel Hill
*
* Postal address: Division of Applied Mathematics, Brown University, Box F, 182 George St., Providence, RI 02912, USA.
** Postal address: Department of Statistics and Operations Research, University of Carolina at Chapel Hill, 318 Hanes Hall, Chapel Hill, NC 27599, USA. Email address: danedane@email.unc.edu
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Abstract

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Subsolutions to the Hamilton–Jacobi–Bellman equation associated with a moderate deviations approximation are used to design importance sampling changes of measure for stochastic recursive equations. Analogous to what has been done for large deviations subsolution-based importance sampling, these schemes are shown to be asymptotically optimal under the moderate deviations scaling. We present various implementations and numerical results to contrast their performance, and also discuss the circumstances under which a moderate deviation scaling might be appropriate.

MSC classification

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Type
Research Article
Copyright
Copyright © Applied Probability Trust 2017