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- W2975732014 abstract "Due to their conjugate posteriors, Gaussian process priors are attractive for estimating the drift of stochastic differential equations with continuous time observations. However, their performance strongly depends on the choice of the hyper-parameters. We employ the marginal maximum likelihood estimator to estimate the scaling and/or smoothness parameter(s) of the prior and show that the corresponding posterior has optimal rates of convergence. General theorems do not apply directly to this model as the usual test functions are with respect to a random Hellinger-type metric. We allow for continuous and discrete, one- and two-dimensional sets of hyper-parameters, where optimising over the two-dimensional set of smoothness and scaling hyper-parameters is shown to be beneficial in terms of the adaptive range." @default.
- W2975732014 created "2019-10-03" @default.
- W2975732014 creator A5036650038 @default.
- W2975732014 date "2019-09-27" @default.
- W2975732014 modified "2023-09-26" @default.
- W2975732014 title "Adaptive posterior contraction rates for empirical Bayesian drift estimation of a diffusion" @default.
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