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Classes of life distributions and renewal counting process

Published online by Cambridge University Press:  14 July 2016

Yi-Hau Chen*
Affiliation:
National Taiwan University
*
Postal address: National Taiwan University, College of Public Health, Graduate Institute of Public Health, Division of Biostatistics, No. 1 Jen-Ai Road Sec. 1, Taipei, Taiwan, ROC.

Abstract

We prove that if the renewal function M(t) corresponding to a life distribution F is convex (concave) then F is NBU (NWU), and hence answer two questions posed by Shaked and Zhu (1992). Moreover, based-on the renewal function, some characterizations of the exponential distribution within certain classes of life distributions are given.

Type
Research Article
Copyright
Copyright © Applied Probability Trust 1994 

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