Multigroup SIR epidemic model with stochastic perturbation

Chunyan Ji, Daqing Jiang and Ningzhong Shi

Physica A: Statistical Mechanics and its Applications, 2011, vol. 390, issue 10, 1747-1762

Abstract: In this paper, we discuss a multigroup SIR model with stochastic perturbation. We deduce the globally asymptotic stability of the disease-free equilibrium when R0≤1, which means the disease will die out. On the other hand, when R0>1, we derive the disease will prevail, which is measured through the difference between the solution and the endemic equilibrium of the deterministic model in time average. Furthermore, we prove the system is persistent in the mean which also reflects the disease will prevail. The key to our analysis is choosing appropriate Lyapunov functions. Finally, we illustrate the dynamic behavior of the model with n=2 and their approximations via a range of numerical experiments.

Keywords: Stochastic multigroup SIR model; Disease-free equilibrium; Endemic equilibrium; Stochastic Lyapunov function; Asymptotically stable in the large; Persistent in mean (search for similar items in EconPapers)
Date: 2011
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Citations: View citations in EconPapers (22)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:390:y:2011:i:10:p:1747-1762

DOI: 10.1016/j.physa.2010.12.042

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