A unified approach to the calculation of information operators in semiparametric models.

A unified approach to the calculation of information operators in semiparametric models.
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一种统一的方法,用于计算半参数模型中的信息运营商。

DOI:
10.1093/biomet/asaa037
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发表时间:
2020-12
期刊:
影响因子:
2.7
通讯作者:
Mao LU
Mao LU
中科院分区:
数学2区
文献类型:
--
作者:
Mao LU

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干扰参数的无限维信息算子在半参数推理中起着关键作用,因为它与目标参数的正则可估计性密切相关。信息算子的计算传统上以具体情况具体分析的方式进行,并且常常需要带有复杂论证的冗长推导。我们通过利用半参数似然形式的共性,为这项任务开发了一个统一的框架。所开发的通用公式允许人们通过简单的微积分以及(如果有必要的话)最少量的概率评估来导出信息运算符。这种简化的方法显示了其在许多现有模型以及具有实际意义的新模型的应用中的简单性和多功能性。
The infinite-dimensional information operator for the nuisance parameter plays a key role in semiparametric inference, as it is closely related to the regular estimability of the target parameter. Calculation of information operators has traditionally proceeded in a case-by-case manner and has often entailed lengthy derivations with complicated arguments. We develop a unified framework for this task by exploiting commonality in the form of semiparametric likelihoods. The general formula developed allows one to derive information operators with simple calculus and, if necessary at all, a minimal amount of probabilistic evaluation. This streamlined approach shows its simplicity and versatility in application to a number of existing models as well as a new model of practical interest.
DOI: 10.1111/rssb.12177
发表时间: 2017-03
期刊: Journal of the Royal Statistical Society. Series B, Statistical methodology
影响因子: --
作者:
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通讯作者: Lin DY
DOI: 10.1002/sim.8201
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