Source: J. Appl. Probab. Volume 46, Number 4
(2009), 1130-1145.
In this paper we present an explicit solution to the infinite-horizon
optimal stopping problem for processes with stationary independent
increments, where reward functions admit a certain representation in terms
of the process at a random time. It is shown that it is optimal to stop at
the first time the process crosses a level defined as the root of an
equation obtained from the representation of the reward function. We
obtain an explicit formula for the value function in terms of the infimum
and supremum of the process, by making use of the Wiener--Hopf
factorization. The main results are applied to several problems considered
in the literature, to give a unified approach, and to new optimization
problems from the finance industry.
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