Published online by Cambridge University Press: 14 July 2016
The sojourn time that a Markov chain spends in a subset E of its state space has a distribution that depends on the hitting distribution on E and the probabilities (resp. rates in the continuous-time case) that govern the transitions within E. In this note we characterise the set of all hitting distributions for which the sojourn time distribution is geometric (resp. exponential).
Research supported in part by the Swedish Natural Science Research Council.
Partly completed while visiting the Center for Stochastic Processes, University of North Carolina at Chapel Hill.