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- W3123587029 abstract "This work develops likelihood-based unit root tests in the noncausal autoregressive (NCAR) model formulated by Lanne and Saikkonen (2011, Journal of Time Series Econometrics 3, Iss. 3, Article 2). The possible unit root is assumed to appear in the causal autoregressive polynomial and for reasons of identification the error term of the model is supposed to be non-Gaussian. In order to derive the tests, asymptotic properties of the maximum likelihood estimators are established under the unit root hypothesis. The limiting distributions of the proposed tests depend on a nuisance parameter determined by the distribution of the error term of the model. A simple procedure to handle this nuisance parameter dependence in applications is proposed. Finite sample properties of the tests are examined by means of Monte Carlo simulations. The results show that the size properties of the tests are satisfactory and the power against stationary NCAR alternatives is significantly higher than the power of conventional Dickey-Fuller tests and the M-tests of Lucas (1995, Econometric Theory 11, 331-346). In an empirical application to a Finnish interest rate series evidence in favour of a stationary NCAR model with leptokurtic errors is found. Key words: Maximum likelihood estimation; Noncausal autoregressive model; Non-Gaussian time series; Unit root." @default.
- W3123587029 created "2021-02-01" @default.
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- W3123587029 date "2013-11-17" @default.
- W3123587029 modified "2023-09-27" @default.
- W3123587029 title "Testing for a unit root in noncausal autoregressive models" @default.
- W3123587029 hasPublicationYear "2013" @default.
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