The expected discounted penalty function under a renewal risk model with stochastic income |
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Authors: | Yongxia Zhao Chuancun Yin |
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Affiliation: | a School of Finance and Statistic, East China Normal University, 200241 Shanghai, China b School of Mathematical Sciences, Qufu Normal University, Qufu, 273165 Shandong, China |
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Abstract: | In this paper, we consider a renewal risk model with stochastic premiums income. We assume that the premium number process and the claim number process are a Poisson process and a generalized Erlang (n) processes, respectively. When the individual stochastic premium sizes are exponentially distributed, the Laplace transform and a defective renewal equation for the Gerber-Shiu discounted penalty function are obtained. Furthermore, the discounted joint distribution of the surplus just before ruin and the deficit at ruin is given. When the claim size distributions belong to the rational family, the explicit expression of the Gerber-Shiu discounted penalty function is derived. Finally, a specific example is provided. |
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Keywords: | Gerber-Shiu discounted penalty function Laplace transform Defective renewal equation Stochastic income |
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