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Title:Testing for structural breaks in nonlinear dynamic models using artificial neural network approximations PDF Logo
Authors:Kapetanios, George
Issue Date:2002
Series/Report no.:Working Paper, Department of Economics, Queen Mary, University of London 470
Abstract:In this paper we suggest a number of statistical tests based on neural network models, that are designed to be powerful against structural breaks in otherwise stationary time series processes while allowing for a variety of nonlinear specifications for the dynamic model underlying them. It is clear that in the presence of nonlinearity standard tests of structural breaks for linear models may not have the expected performance under the null hypothesis of no breaks because the model is misspecified. We therefore proceed by approximating the conditional expectation of the dependent variable through a neural network. Then, the residual from this approximation is tested using standard residual based structural break tests. We investigate the asymptoptic behaviour of residual based structural break tests in nonlinear regression models. Monte Carlo evidence suggests that the new tests are powerful against a variety of structural breaks while allowing for stationary nonlinearities.
Subjects:Nonlinearity, Structural breaks, Neural networks
JEL:C22
C12
C45
Document Type:Working Paper
Appears in Collections:Working Paper Series, School of Economics and Finance, Queen Mary, University of London

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