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Calculation of Ruin Probabilities when the Claim Distribution is Lognormal

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  • Thorin, Olof
  • Wikstad, Nils

Abstract

In this paper some ruin probabilities are calculated for an example of a lognormal claim distribution. For that purpose it is shown that the lognormal distribution function, Λ(y), may be written in the formwhere V(x) is absolutely continuous and without being a distribution function preserves some useful properties of such a function.An attempt is also made to give an approximant Λα(y) to Λ(y) such that Λα(y) is a linear combination of a low number of exponential distributions. For comparison, ruin probabilities are also calculated for two examples of Λα(y).In the considered numerical cases it is assumed that the occurrence of claims follows a Poisson process.

Suggested Citation

  • Thorin, Olof & Wikstad, Nils, 1977. "Calculation of Ruin Probabilities when the Claim Distribution is Lognormal," ASTIN Bulletin, Cambridge University Press, vol. 9(1-2), pages 231-246, January.
    • Handle: RePEc:cup:astinb:v:9:y:1977:i:1-2:p:231-246_01
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    Citations

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    Cited by:

    1. Grandell, Jan, 2000. "Simple approximations of ruin probabilities," Insurance: Mathematics and Economics, Elsevier, vol. 26(2-3), pages 157-173, May.
    2. Pawel Mista, 2006. "Analytical and numerical approach to corporate operational risk modelling," HSC Research Reports HSC/06/03, Hugo Steinhaus Center, Wroclaw University of Technology.
    3. Leipus, Remigijus & Siaulys, Jonas, 2007. "Asymptotic behaviour of the finite-time ruin probability under subexponential claim sizes," Insurance: Mathematics and Economics, Elsevier, vol. 40(3), pages 498-508, May.
    4. Ramsay, Colin M., 2003. "A solution to the ruin problem for Pareto distributions," Insurance: Mathematics and Economics, Elsevier, vol. 33(1), pages 109-116, August.
    5. Baltru-nas, Aleksandras, 2005. "Second order behaviour of ruin probabilities in the case of large claims," Insurance: Mathematics and Economics, Elsevier, vol. 36(3), pages 485-498, June.
    6. Søren Asmussen & Jens Ledet Jensen & Leonardo Rojas-Nandayapa, 2016. "Exponential Family Techniques for the Lognormal Left Tail," Scandinavian Journal of Statistics, Danish Society for Theoretical Statistics;Finnish Statistical Society;Norwegian Statistical Association;Swedish Statistical Association, vol. 43(3), pages 774-787, September.

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