Uniform asymptotics for ruin probabilities of a non standard bidimensional perturbed risk model with subexponential claims

Abstract

In this paper, we consider three types of finite-time ruin probabilities for a non standard bidimensional risk model perturbed by diffusion. In this model, it is assumed that the two claim-arrival processes are general counting processes and arbitrarily dependent. Moreover, the two classes of claim sizes are dependent according to a certain structure proposed in Ko and Tang (Journal of Applied Probability 45:5–95, 2008). When the claim sizes are assumed to be subexponential, we derive three uniformly asymptotic formulas for finite-time ruin probabilities over a finite interval of time horizon. The obtained results extend some existing ones in the literature.