an:06764682
Zbl 1371.60167
Yazici, Mehmet Akif; Akar, Nail
The finite/infinite horizon ruin problem with multi-threshold premiums: a Markov fluid queue approach
EN
Ann. Oper. Res. 252, No. 1, 85-99 (2017).
00366149
2017
j
60K25 90B22 91B30 68M20
ruin probabilities; Markov fluid queues; numerical method
Summary: We present a new numerical method to obtain the finite- and infinite-horizon ruin probabilities for a general continuous-time risk problem. We assume the claim arrivals are modeled by the versatile Markovian arrival process, the claim sizes are PH-distributed, and the premium rate is allowed to depend on the instantaneous risk reserve in a piecewise-constant manner driven by a number of thresholds, i.e., multi-threshold premiums. We introduce a novel sample path technique by which the ruin problems are shown to reduce to the steady-state solution of a certain multi-regime Markov fluid queue. We propose to use the already existing numerically efficient and stable numerical algorithms for such Markov fluid queues. Numerical results are presented to validate the effectiveness of the proposed method regarding the computation of the finite- and infinite-horizon ruin probabilities for risk models including those with relatively large number of thresholds.