Abstract
In sampling from finite populations conditional minimax estimators are equivalent to BLU estimators. This has been shown by Gabler (1988). If the covariance matrix is singular the BLU estimator can be represented in two different ways.
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References
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Gabler, S. An identity for reflexive g-inverses in the context with BLU estimators. Statistical Papers 31, 225–231 (1990). https://doi.org/10.1007/BF02924693
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DOI: https://doi.org/10.1007/BF02924693