On exponentials of additive functionals of Markov processes

W. Stummer and K. -Th. Sturm

Stochastic Processes and their Applications, 2000, vol. 85, issue 1, 45-60

Abstract: We give necessary and sufficient conditions in order that exponentials of additive functionals of Markov processes have finite expectations. Furthermore, we obtain sharp estimates for these expectations. More precisely, we investigate both the Stieltjes exponential and the ordinary exponential of right-continuous additive functionals of general right-continuous, time-inhomogenous Markov processes. The well-known Khas'minskii Lemma (1959, Probab. Appl. 4, 309-318) follows as a corollary.

Keywords: Markov; processes; Additive; functionals; Khas'; minskii; Lemma (search for similar items in EconPapers)
Date: 2000
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