Robust estimators of accelerated failure time regression with generalized log-gamma errors

Details

Serval ID
serval:BIB_D9631578E973
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Robust estimators of accelerated failure time regression with generalized log-gamma errors
Journal
Computational Statistics & Data Analysis
Author(s)
Agostinelli C., Locatelli I., Marazzi A., Yohai V.J.
ISSN
0167-9473
Publication state
Published
Issued date
03/2017
Volume
107
Pages
92-106
Language
english
Abstract
The generalized log-gamma (GLG) model is a very flexible family of distributions to analyze datasets in many different areas of science and technology. Estimators are proposed which are simultaneously highly robust and highly efficient for the parameters of a GLG distribution in the presence of censoring. Estimators with the same properties for accelerated failure time models with censored observations and error distribution belonging to the GLG family are also introduced. It is proven that the proposed estimators are asymptotically fully efficient and the maximum mean square error is examined using Monte Carlo simulations. The simulations confirm that the proposed estimators are highly robust and highly efficient for a finite sample size. Finally, the benefits of the proposed estimators in applications are illustrated with the help of two real datasets.
Keywords
Censored dataQuantile distance estimatesτ estimatorsTruncated maximum likelihood estimatorsWeighted likelihood estimators
Web of science
Create date
10/08/2017 14:36
Last modification date
20/08/2019 16:58
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