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Some properties of ageing notions based on the moment-generating-function order

Published online by Cambridge University Press:  14 July 2016

Xiaohu Li*
Affiliation:
Lanzhou University
*
Postal address: Department of Mathematics, Lanzhou University, Lanzhou 730000, P. R. China. Email address: [email protected]

Abstract

Classes of life distributions based on the moment-generating-function order are investigated in this paper. It is shown firstly that the class ℳ is closed under both convex linear combination and geometric compounding. Secondly, the class NBUmg (new better than used in the moment-generating-function order) is proved to be closed under increasing star-shaped transformations. Finally, the interplay between the stochastic comparison of the excess lifetime of a renewal process and the NBUmg interarrivals is studied.

Type
Short Communications
Copyright
Copyright © Applied Probability Trust 2004 

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