A robust Liu regression estimator


Filzmoser P., KURNAZ F. S.

COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION, cilt.47, ss.432-443, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 47 Konu: 2
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1080/03610918.2016.1271889
  • Dergi Adı: COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION
  • Sayfa Sayıları: ss.432-443

Özet

The least-squares regression estimator can be very sensitive in the presence of multicollinearity and outliers in the data. We introduce a new robust estimator based on the MM estimator. By considering weights, also the resulting MM-Liu estimator is highly robust, but also the estimation of the biasing parameter is robustified. Also for high-dimensional data, a robust Liu-type estimator is introduced, based on the Partial Robust M-estimator. Simulation experiments and a real dataset show the advantages over the standard estimators and other robustness proposals.