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Article Dans Une Revue ESAIM: Probability and Statistics Année : 2020

One-step estimation for the fractional Gaussian noise at high-frequency

Résumé

The present paper concerns the parametric estimation for the fractional Gaussian noise in a high-frequency observation scheme. The sequence of Le Cam’s one-step maximum likelihood estimators (OSMLE) is studied. This sequence is defined by an initial sequence of quadratic generalized variations-based estimators (QGV) and a single Fisher scoring step. The sequence of OSMLE is proved to be asymptotically efficient as the sequence of maximum likelihood estimators but is much less computationally demanding. It is also advantageous with respect to the QGV which is not variance efficient. Performances of the estimators on finite size observation samples are illustrated by means of Monte-Carlo simulations.
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Dates et versions

hal-03022878 , version 1 (25-11-2020)

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Alexandre Brouste, Marius Soltane, Irene Votsi. One-step estimation for the fractional Gaussian noise at high-frequency. ESAIM: Probability and Statistics, 2020, 24, pp.827-841. ⟨10.1051/ps/2020022⟩. ⟨hal-03022878⟩
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