Quasi-Monte Carlo Method for Infinitely Divisible Random Vectors via Series Representations

  • Authors:
  • Junichi Imai;Reiichiro Kawai

  • Affiliations:
  • jimai@ae.keio.ac.jp;reiichiro.kawai@gmail.com

  • Venue:
  • SIAM Journal on Scientific Computing
  • Year:
  • 2010

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Abstract

An infinitely divisible random vector without Gaussian component admits representations of shot noise series. Due to possible slow convergence of the series, they have not been investigated as a device for Monte Carlo simulation. In this paper, we investigate the structure of shot noise series representations from a simulation point of view and discuss the effectiveness of quasi-Monte Carlo methods applied to series representations. The structure of series representations in nature tends to decrease their effective dimension and thus increase the efficiency of quasi-Monte Carlo methods, thanks to the greater uniformity of low-discrepancy sequence in the lower dimension. We illustrate the effectiveness of our approach through numerical results of moment and tail probability estimations for stable and gamma random variables.