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Stability of equilibriums of stochastically perturbed delay differential neoclassical growth model
School of Electrical Engineering, TelAviv University, TelAviv 69978, Israel 
The known nonlinear delay differential neoclassical growth model is considered. It is assumed that this model is influenced by stochastic perturbations of the white noise type and these perturbations are directly proportional to the deviation of the system state from the zero or a positive equilibrium. Sufficient conditions for stability in probability of the positive equilibrium and for exponential mean square stability of the zero equilibrium are obtained. Numerical calculations and figures illustrate the obtained stability regions and behavior of stable and unstable solutions of the considered model. The proposed investigation procedure can be applied for arbitrary nonlinear stochastic delay differential equations with the order of nonlinearity higher than one.
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Matsumoto and F. Szidarovszky A., Asymptotic behavior of a delay differential neoclassical growth model, Sustainability, 5 (2013), 440455. Google Scholar 
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J. Nicholson A., An outline of the dynamics of animal populations, Aust. J. Zool., 2 (1954), 965. Google Scholar 
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[10]  Shaikhet L., Lyapunov functionals and Stability of Stochastic Functional Differential Equations, Springer. Dordrecht. Heidelberg. New York. London, 2013. 
show all references
References:
[1] 
Bradul and L. Shaikhet N., Stability of the positive point of equilibrium of Nicholson's blowflies equation with stochastic perturbations: Numerical analysis, Discrete Dyn. Nat. Soc., 2007 (2007), 9295992983. Google Scholar 
[2] 
Chen and W. Wang W., Global exponential stability for a delay differential neoclassical growth model, Adv. Differ. Equ., 2014 (2014), 325. Google Scholar 
[3] 
Day R., Irregular growth cycles, Am. Econ. Rev., 72 (1982), 406414. Google Scholar 
[4] 
Day R., The Emergence of chaos from classical economic growth, Q. J. Econ., 98 (1983), 203213. Google Scholar 
[5]  I. Gikhman and A. V. Skorokhod I., Stochastic Differential Equations, Springer. Berlin, 1972. 
[6] 
Matsumoto and F. Szidarovszky A., Delay differential neoclassical growth model, J. Econ. Behav. Organ., 78 (2011), 272289. Google Scholar 
[7] 
Matsumoto and F. Szidarovszky A., Asymptotic behavior of a delay differential neoclassical growth model, Sustainability, 5 (2013), 440455. Google Scholar 
[8] 
J. Nicholson A., An outline of the dynamics of animal populations, Aust. J. Zool., 2 (1954), 965. Google Scholar 
[9]  Shaikhet L., Lyapunov Functionals and Stability of Stochastic Difference Equations, Springer. London. Dordrecht. Heidelberg. New York, 2011. 
[10]  Shaikhet L., Lyapunov functionals and Stability of Stochastic Functional Differential Equations, Springer. Dordrecht. Heidelberg. New York. London, 2013. 
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