Gapeev, Pavel V. ORCID: 0000-0002-1346-2074
(2005)
The disorder problem for compound Poisson processes with exponential jumps.
Annals of Applied Probability, 15 (1A).
pp. 487-499.
ISSN 1050-5164
Abstract
The problem of disorder seeks to determine a stopping time which is as close as possible to the unknown time of “disorder” when the observed process changes its probability characteristics. We give a partial answer to this question for some special cases of Lévy processes and present a complete solution of the Bayesian and variational problem for a compound Poisson process with exponential jumps. The method of proof is based on reducing the Bayesian problem to an integro-differential free-boundary problem where, in some cases, the smooth-fit principle breaks down and is replaced by the principle of continuous fit.
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