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Covariance tapering for multivariate Gaussian random fields estimation. (English) Zbl 1416.62550
Summary: In recent literature there has been a growing interest in the construction of covariance models for multivariate Gaussian random fields. However, effective estimation methods for these models are somehow unexplored. The maximum likelihood method has attractive features, but when we deal with large data sets this solution becomes impractical, so computationally efficient solutions have to be devised. In this paper we explore the use of the covariance tapering method for the estimation of multivariate covariance models. In particular, through a simulation study, we compare the use of simple separable tapers with more flexible multivariate tapers recently proposed in the literature and we discuss the asymptotic properties of the method under increasing domain asymptotics.

MSC:
62M40 Random fields; image analysis
62P12 Applications of statistics to environmental and related topics
86A32 Geostatistics
Software:
spam; CompRandFld
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