It is proved that there is no best estimator in the class under mean-squared-error criterion and the Analysis-of-variance (ANOVA) estimator is also inadmissible.

证明了在均方误差准则下，在该估计类中不存在一致最优不变估计，且方差分析估计是不容许估计。

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Consistency is the hallmark of Chi Chow, the best earnings estimator in the Oil, Gas and Consumable Fuels industry and the fifth best estimator among all analysts.

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