ON THE PARISIAN RUIN OF THE DUAL LEVY RISK MODEL

In this paper we investigate the Parisian ruin problem of the general dual Levy risk model. Unlike the usual concept of ultimate ruin, allowing the surplus level to be negative within a prespecified period indicates that the deficit at Parisian ruin is not necessarily equal to zero. Hence, we consider a Gerber-Shiu type expected discounted penalty function at the Parisian ruin and obtain an explicit expression for this function under the dual Levy risk model. As particular cases, we calculate the Parisian ruin probability and the expected discounted kth moments of the deficit at the Parisian ruin for the compound Poisson dual risk model and a drift-diffusion model. Numerical examples are given to illustrate the behavior of Parisian ruin and the expected discounted deficit at Parisian ruin.