Least median of weighted squares in logistic regression with large strata
大分层Logistic回归中的加权平方最小中位数估计AI 解读 ↓
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One aim of robust regression is to find estimators with high finite sample breakdown points. Although various robust estimators have been proposed in logistic regression models, their breakdown points are not yet known. Here it is shown for logistic regression models with binary data that there is no estimator with a high finite sample breakdown point, provided the estimator has to fulfill a weak condition. In logistic regression models with large strata however, a modification of Rousseeuw's least median of squares estimator is shown to have a finite sample breakdown point of approximately ½.