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Moments of the time of ruin in a renewal risk model with discounted penalty

Author

Listed:
  • K.K. Thampi
  • M.J. Jacob

Abstract

Purpose - This paper considers a Sparre Andersen risk process for which the claims inter‐arrival distribution is Generalized Exponential. The purpose of this paper is to find explicit expressions for the moments of time to ruin when a penalty is imposed at ruin. Design/methodology/approach - The study is focused on the functionϕδ(u), the expected discounted penalty, which is due at ruin and may depend on the deficit at the time of ruin and also on the surplus prior to ruin. It shows thatϕδ(u) satisfies an integro‐differential equation which is solved using Laplace transforms. Findings - The authors have chosen a penalty function, which is independent of the surplus immediately before ruin, and a closed form expression is obtained forϕδ(u), and then solved for the moments of time to ruin. Originality/value - New results are derived, many of which have mathematical and probabilistic interpretations, and additional insight is gained for the results in the renewal risk model.

Suggested Citation

  • K.K. Thampi & M.J. Jacob, 2008. "Moments of the time of ruin in a renewal risk model with discounted penalty," Journal of Risk Finance, Emerald Group Publishing Limited, vol. 9(2), pages 173-187, February.
    • Handle: RePEc:eme:jrfpps:15265940810853922
    DOI: 10.1108/15265940810853922
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