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On the Marginal Distribution of the Diagonal Blocks in a Blocked Wishart Random Matrix

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Listed:
  • Kjetil B. Halvorsen
  • Victor Ayala
  • Eduardo Fierro

Abstract

Let be a blocked Wishart random matrix with diagonal blocks of orders and . The goal of the paper is to find the exact marginal distribution of the two diagonal blocks of . We find an expression for this marginal density involving the matrix-variate generalized hypergeometric function. We became interested in this problem because of an application in spatial interpolation of random fields of positive definite matrices, where this result will be used for parameter estimation, using composite likelihood methods.

Suggested Citation

  • Kjetil B. Halvorsen & Victor Ayala & Eduardo Fierro, 2016. "On the Marginal Distribution of the Diagonal Blocks in a Blocked Wishart Random Matrix," International Journal of Analysis, Hindawi, vol. 2016, pages 1-5, November.
    • Handle: RePEc:hin:ijanal:5967218
    DOI: 10.1155/2016/5967218
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    References listed on IDEAS

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    1. Díaz-García, José A. & González-Farías, Graciela, 2005. "Singular random matrix decompositions: distributions," Journal of Multivariate Analysis, Elsevier, vol. 94(1), pages 109-122, May.
    2. Díaz-García, José A. & Jáimez, Ramón Gutierrez & Mardia, Kanti V., 1997. "Wishart and Pseudo-Wishart Distributions and Some Applications to Shape Theory," Journal of Multivariate Analysis, Elsevier, vol. 63(1), pages 73-87, October.
    3. Díaz-García, José A. & González-Farías, Graciela, 2005. "Singular random matrix decompositions: Jacobians," Journal of Multivariate Analysis, Elsevier, vol. 93(2), pages 296-312, April.
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