On the so-called "Huber Sandwich Estimator" and "Robust Standard Errors"

被引:326
作者
Freedman, David A. [1 ]
机构
[1] Univ Calif Berkeley, Dept Stat, Berkeley, CA 94720 USA
关键词
maximum likelihood; specification error; White's correction;
D O I
10.1198/000313006X152207
中图分类号
O21 [概率论与数理统计]; C8 [统计学];
学科分类号
020208 ; 070103 ; 0714 ;
摘要
The "Huber Sandwich Estimator" can be used to estimate the variance of the MLE when the underlying model is incorrect. If the model is nearly correct, so are the usual standard errors, and robustification is unlikely to help much. On the other hand, if the model is seriously in error, the sandwich may help on the variance side, but the parameters being estimated by the MLE are likely to be meaningless-except perhaps as descriptive statistics.
引用
收藏
页码:299 / 302
页数:4
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