Efficient estimation of one-dimensional diffusion first passage time densities via Monte Carlo simulation

Details Efficient estimation of one-dimensional diffusion first passage time densities via Monte Carlo simulation Efficient estimation of one-dimensional diffusion first passage time densities via Monte Carlo simulation

2010-08-07

arxiv.org/abs/1008.1326v1

Mathematics

Probability

14 pages, 2 figures

Scientific paper

We propose a method for estimating first passage time densities of one-dimensional diffusions via Monte Carlo simulation. Our approach involves a representation of the first passage time density as expectation of a functional of the three-dimensional Brownian bridge. As the latter process can be simulated exactly, our method leads to almost unbiased estimators. Furthermore, since the density is estimated directly, a convergence of order $1 / \sqrt{N}$, where $N$ is the sample size, is achieved, the last being in sharp contrast to the slower non-parametric rates achieved by kernel smoothing of cumulative distribution functions.

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