Bootstrapping covariance operators of functional time series

Olimjon Sh. Sharipov and Martin Wendler

Journal of Nonparametric Statistics, 2020, vol. 32, issue 3, 648-666

Abstract: For testing hypothesis on the covariance operator of functional time series, we suggest to use the full functional information and to avoid dimension reduction techniques. The limit distribution follows from the central limit theorem of the weak convergence of the partial sum process in general Hilbert space applied to the product space. In order to obtain critical values for tests, we generalise bootstrap results from the independent to the dependent case. This results can be applied to covariance operators, autocovariance operators and cross covariance operators. We discuss one sample and changepoint tests and give some simulation results.

Date: 2020
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DOI: 10.1080/10485252.2020.1771334

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