In this paper, we are interested in deriving non-asymptotic error bounds for the multilevel Monte Carlo method. As a first step, we deal with the explicit Euler discretization of stochastic differential equations with a constant diffusion coefficient. We prove that, as long as the deviation is below an explicit threshold, a Gaussian-type concentration inequality optimal in terms of the variance holds for the multilevel estimator. To do so, we use the Clark-Ocone representation formula and derive bounds for the moment generating functions of the squared difference between a crude Euler scheme and a finer one and of the squared difference of their Malliavin derivatives.
CITATION STYLE
Jourdain, B., & Kebaier, A. (2019). Non-asymptotic error bounds for the multilevel monte carlo euler method applied to sdes with constant diffusion coefficient. Electronic Journal of Probability, 24. https://doi.org/10.1214/19-EJP271
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