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On asymptotically efficient simulation of large deviation probabilities

Published online by Cambridge University Press:  01 July 2016

A. B. Dieker*
Affiliation:
CWI and University of Twente
M. Mandjes*
Affiliation:
CWI and University of Amsterdam
*
∗ Postal address: CWI, P.O. Box 94079, 1090 GB Amsterdam, The Netherlands.
∗ Postal address: CWI, P.O. Box 94079, 1090 GB Amsterdam, The Netherlands.
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Abstract

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Let {νε, ε>0} be a family of probabilities for which the decay is governed by a large deviation principle, and consider the simulation of νε0 (A) for some fixed measurable set A and some ε0>0. We investigate the circumstances under which an exponentially twisted importance sampling distribution yields an asymptotically efficient estimator. Varadhan's lemma yields necessary and sufficient conditions, and these are shown to improve on certain conditions of Sadowsky. This is illustrated by an example to which Sadowsky's conditions do not apply, yet for which an efficient twist exists.

Information

Type
General Applied Probability
Copyright
Copyright © Applied Probability Trust 2005