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November 2007 Stochastic domination for a hidden Markov chain with applications to the contact process in a randomly evolving environment
Erik I. Broman
Ann. Probab. 35(6): 2263-2293 (November 2007). DOI: 10.1214/0091179606000001187

Abstract

The ordinary contact process is used to model the spread of a disease in a population. In this model, each infected individual waits an exponentially distributed time with parameter 1 before becoming healthy. In this paper, we introduce and study the contact process in a randomly evolving environment. Here we associate to every individual an independent two-state, {0, 1}, background process. Given δ0<δ1, if the background process is in state 0, the individual (if infected) becomes healthy at rate δ0, while if the background process is in state 1, it becomes healthy at rate δ1. By stochastically comparing the contact process in a randomly evolving environment to the ordinary contact process, we will investigate matters of extinction and that of weak and strong survival. A key step in our analysis is to obtain stochastic domination results between certain point processes. We do this by starting out in a discrete setting and then taking continuous time limits.

Citation

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Erik I. Broman. "Stochastic domination for a hidden Markov chain with applications to the contact process in a randomly evolving environment." Ann. Probab. 35 (6) 2263 - 2293, November 2007. https://doi.org/10.1214/0091179606000001187

Information

Published: November 2007
First available in Project Euclid: 8 October 2007

zbMATH: 1126.82024
MathSciNet: MR2353388
Digital Object Identifier: 10.1214/0091179606000001187

Subjects:
Primary: 60K35, 82C22

Rights: Copyright © 2007 Institute of Mathematical Statistics

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Vol.35 • No. 6 • November 2007
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