O. Kella et W. Stadje, On hitting times for compound Poisson dams with exponential jumps and linear release rate, J APPL PROB, 38(3), 2001, pp. 781-786
For a compound Poisson dam with exponential jumps and linear release rate (
shot-noise process), we compute the Laplace-Stieltjes transform (LST) and t
he mean of the hitting time of some positive level given that the process s
tarts from some given positive level. The solution for the LST is in terms
of confluent hypergeometric functions of the first and second kinds (Kummer
functions).