Estimators and Spread
估计量与分布的离散程度AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要属于一般估计理论,分布函数比较本身不足以归为分位数与分布效应研究。
估计量与分布的离散程度AI 解读 ↓
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Arbitrary, possibly randomized estimators of a one-dimensional parameter are considered. It is shown that suitable averages of their distribution functions are more spread out than particular distribution functions, which are defined in terms of the weight functions by which the averages are taken over the parameter space and in terms of the family of distributions for the random quantity on which the estimators are based. In this way bounds are provided for the performance of arbitrary estimators of the parameter. As consequences of this nonasymptotic spread inequality, which will be proved under mild regularity conditions, a local asymptotic minimax inequality and a generalization of the classical results on superefficiency can be derived, thus showing the strength of our spread inequality.