On Hsu's theorem in multivariate regression |
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Authors: | J Kleffe |
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Institution: | Academy of Sciences of the GDR, Berlin, German Democratic Republic |
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Abstract: | The paper deals with optimal quadratic unbiased estimation of the unknown dispersion matrix in multivariate regression models without assuming normality of the errors. We show that Hsu's theorem for univariate regression models continues to multivariate models with no additional assumptions. Furthermore optimal quadratic plus linear estimating functions for regression coefficients are considered, and we investigate whether the ordinary linear estimates are the best. This leads to a new theorem which is similar to that of Hsu. |
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Keywords: | 62H99 62H10 Multivariate linear model minimum variance invariant quadratic unbiased estimation |
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