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Reference

  • Puntanen and Styan, (1989), On the equality of the ordinary least squares estimator and the best linear unbiased estimator,The American Statistician 43, 153–164

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Reference

  • J. R. Magnus, H. Neudecker (1999),Matrix Differential Calculus with Applications in Statistics and Econometrics, John Wiley & Sons, Chichester

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Problem section. Statistical Papers 44, 290–292 (2003). https://doi.org/10.1007/BF03036360

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  • DOI: https://doi.org/10.1007/BF03036360

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