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Erscheinungsjahr: 
2006
Schriftenreihe/Nr.: 
SSE/EFI Working Paper Series in Economics and Finance No. 632
Verlag: 
Stockholm School of Economics, The Economic Research Institute (EFI), Stockholm
Zusammenfassung: 
This paper studies the stability of nonlinear autoregressive models with conditionally heteroskedastic errors. We consider a nonlinear autoregression of order p (AR(p)) with the conditional variance specified as a nonlinear first order generalized autoregressive conditional heteroskedasticity (GARCH(1,1)) model. Conditions under which the model is stable in the sense that its Markov chain representation is geometrically ergodic are provided. This implies the existence of an initial distribution such that the process is strictly stationary and beta-mixing. Conditions under which the stationary distribution has finite moments are also given. The results cover several nonlinear specifications recently proposed for both the conditional mean and conditional variance.
JEL: 
C22
Dokumentart: 
Working Paper

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