RT Journal Article
T1 Robust estimators for the log-logistic model based on ranked set sampling
A1 Felipe Ortega, Ángel
A1 Jaenada Malagón, María
A1 Miranda Menéndez, Pedro
A1 Pardo Llorente, Leandro
AB In this paper, we introduce a novel family of estimators for the shape and scale parameters of the log-logistic distribution being robust when rank set sample method for data selection is used. Rank set sampling effectively reduces the influence of extreme data points. The log-logistic distribution is a versatile model, suitable in various fields such as Economics, Engineering, and Hydrology. Our proposed family of estimators is based on the density power divergence, chosen for its demonstrated robustness and efficiency. Notably, this family includes the classical maximum likelihood estimator as a special case. Besides explicit forms of the estimators, their asymptotic distribution is derived, proving the consistency of the estimators. Finally, a comprehensive simulation study illustrates the significant robustness of the proposed estimators in the presence of data contamination, while also performing competitively with traditional estimators, including the maximum likelihood estimator in terms of efficiency.
PB Springer
SN 2520-8756
SN 2520-8764
YR 2025
FD 2025
LK https://hdl.handle.net/20.500.14352/125802
UL https://hdl.handle.net/20.500.14352/125802
LA eng
NO This version of the article has been accepted for publication, after peer review and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s42081-024-00272-z
NO Ministerio de Ciencia e Innovación
DS Docta Complutense
RD 20 ene 2026