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Published in

Elsevier, Journal of Statistical Planning and Inference, 6(140), p. 1594-1600

DOI: 10.1016/j.jspi.2009.12.027

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Negative aging and stochastic comparisons of residual lifetimes in multivariate frailty models

Journal article published in 2010 by Julio Mulero, Franco Pellerey, Rosario Rodríguez-Griñolo ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Consider two random vectors X1 and X2 whose distributions are defined according to the multivariate frailty approach, and let Xk,t=[Xk−t|Xk>t], k=1,2, be the corresponding vectors of residual lifetimes at . Conditions for multivariate stochastic comparisons of random vectors described by the frailty approach have been recently presented in Misra et al. (2009). Here we prosecute their study, providing sufficient conditions for the stochastic comparison X1,t≤stX2,t, where t is an arbitrary vector in Rn. Sufficient conditions for the stochastic comparisons Xi,t≤stXi,t+v, where t is as above and v is a vector with non-negative components, are presented too.