Arbeitspapier
A nonlinear alternative to the unit root hypothesis
This paper considers testing the unit root hypothesis against a smooth transition autoregressive model as the alternative. The model specification makes it possible to discriminate between nonstationary random walk and stationary nonlinear processes. Some new limit results are presented, extending earlier work, and two F type tests are proposed. Small sample simulations show some size distortions, why a bootstrap method for estimating p-values to the tests are considered. Power simulations show some gain in power, compared to the common Augmented Dickey-Fuller tests. Finally, the two proposed F type tests are applied on a number of real exchange rates. For several of the exchange rates considered the linear unit root is rejected in favor of the stationary nonlinear model, supporting the purchasing power parity hypothesis.
- Sprache
-
Englisch
- Erschienen in
-
Series: SSE/EFI Working Paper Series in Economics and Finance ; No. 547
- Klassifikation
-
Wirtschaft
Single Equation Models; Single Variables: Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
Model Evaluation, Validation, and Selection
Foreign Exchange
- Thema
-
Smooth transition autoregressive model
nonlinearity
unit root
Brownian motion
bootstrap
critical values
Monte Carlo simulations
real exchange rates
- Ereignis
-
Geistige Schöpfung
- (wer)
-
Eklund, Bruno
- Ereignis
-
Veröffentlichung
- (wer)
-
Stockholm School of Economics, The Economic Research Institute (EFI)
- (wo)
-
Stockholm
- (wann)
-
2003
- Handle
- Letzte Aktualisierung
-
10.03.2025, 11:42 MEZ
Datenpartner
ZBW - Deutsche Zentralbibliothek für Wirtschaftswissenschaften - Leibniz-Informationszentrum Wirtschaft. Bei Fragen zum Objekt wenden Sie sich bitte an den Datenpartner.
Objekttyp
- Arbeitspapier
Beteiligte
- Eklund, Bruno
- Stockholm School of Economics, The Economic Research Institute (EFI)
Entstanden
- 2003
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