Genton, Marc2006-04-042006-04-042006-04-041993https://infoscience.epfl.ch/handle/20.500.14299/229108In this paper, we derive the correct change-of-variance function for M-estimators of scale under general contamination and apply it on two examples. Then we show that under quite general conditions B-robustness is an automatic by-product of V-robustness.influence functionchange-of-variance functionB-robustV-robustmost B-robustmost V-robusttext::report