- Tail distribution of the maximum of correlated Gaussian random variables
- 2015 Winter Simulation Conference (WSC '15)
- Book/source title
- Proceedings of the 2015 Winter Simulation Conference: December 6-9, 2015, Huntington Beach, CA
- Pages (from-to)
- Piscataway, NJ: IEEE
- Document type
- Conference contribution
- Faculty of Science (FNWI)
- Korteweg-de Vries Institute for Mathematics (KdVI)
In this article we consider the efficient estimation of the tail distribution of the maximum of correlated normal random variables. We show that the currently recommended Monte Carlo estimator has difficulties in quantifying its precision, because its sample variance estimator is an inefficient estimator of the true variance. We propose a simple remedy: to still use this estimator, but to rely on an alternative quantification of its precision. In addition to this we also consider a completely new sequential importance sampling estimator of the desired tail probability. Numerical experiments suggest that the sequential importance sampling estimator can be significantly more efficient than its competitor.
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