对常利率下的信用风险模型进行了研究,运用概率论的分析方法得到了该模型下有限时间内破产概率和破产时间分布所满足的积分方程。进一步通过对破产概率的分析,得出破产前一时刻的瞬时盈余分布和破产时刻余额分布所满足的递推积分方程,完善了Yang Hailiang的相关问题的结果。
The credit risk model under the constant interest force is discussed. By using the analysis method in probability, the integral equations for ruin probability in finite time and distribution of ruin time are obtained. Furthermore, by the analysis of ruin probability, the recurrent integral equations of distribution of immediately surplus before ruin and the distribution of balance at ruin can be derived. These results extend that obtained by Yang Hailiang.