On age composition of dynamic heterogeneous populations

Ji Hwan Cha, Maxim Finkelstein

Research output: Contribution to journalArticlepeer-review


Populations of items continuously manufactured and incepted into operation are characterized by the corresponding distribution of a random age at each instant of chronological time. In this study, we consider heterogeneous populations with lifetime distributions indexed by a frailty parameter. Two approaches to defining the age composition for the described populations are described and the corresponding stochastic comparisons are considered.
Original languageEnglish
Pages (from-to)1-16
Number of pages16
JournalStochastic Models
Early online date19 Oct 2023
Publication statusPublished - 19 Oct 2023


  • age composition
  • frailty
  • heterogeneous populations
  • production rate
  • stochasticcomparisons


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