Augmented Dickey-Fuller unit root tests
Covariate Augmented Dickey-Fuller Tests with R
... 3. P-values computation and the function CADFpvalues() The possibility of computing the p-values of a test greatly increases the chances that the test is effectively used by practitioners. This is a fortiori true when ...
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Behaviour of Dickey-Fuller Unit Root Tests Under Trend Misspecification
... a unit root test is based on a Dickey-Fuller regression whose only deterministic term is a fixed ...the Dickey-Fuller test can display a wide range of different characteristics ...
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On infimum Dickey–Fuller unit root tests allowing for a trend break under the null
... Abstract Trend breaks appear to be prevalent in macroeconomic time series. Consequently, to avoid the catastrophic impact that unmodelled trend breaks have on power it is standard empirical practice to employ unit ...
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On the use of integer and fractional flexible Fourier form Dickey-Fuller unit root tests
... Although instant changes in the deterministic component of macroeconomic aggregates are quite reasonable in some cases, in general they are not. This is a result of the very nature of the aggregate. For an aggregate to ...
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Optimal Fractional Dickey-Fuller Tests for Unit Roots
... optimal tests that are consistent against alternatives that converge to the null at the parametric rate, and where d 1 can be based on semiparametric estimators of ...
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On the limiting behaviour of augmented seasonal unit root tests
... results, computed for p = 4 and p = 8, suggest that the empirical rejection frequencies of both of the DHF tests against a random walk process decline, relative to the case of p = 0, as p is increased. GLN also ...
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Dickey-Fuller Type of Tests against Nonlinear Dynamic Models
... the tests is compared to that of the classical unit root tests by Dickey-Fuller and Phillips and Perron, and is found to be superior in terms of ...
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Deterministic Seasonality in Dickey-Fuller Tests: Should We Care?
... DF tests are obvious: spurious rejections of the unit root null will arise and the problem may become rather dramatic when the standardized seasonal is ...
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The impact of the initial condition on covariate augmented unit root tests
... covariate augmented unit root tests, based on OLS demeaning/detrending and GLS demeaning/detrending, in the presence of asymptotically non-negligible initial ...GLS-based tests in ...
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The impact of the initial condition on covariate augmented unit root tests
... covariate augmented unit root tests, based on OLS demeaning/detrending and GLS demeaning/detrending, in the presence of asymptotically non-negligible initial ...GLS-based tests in ...
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Unusual behaviour of Dickey-Fuller tests in the presence of trend misspecification: comment
... Thus, when the number of the initial observations that are discarded is rather small, the τ τ -test exhibits very unusual behaviour. For the range of values of the autoregressive parameter that are considerably smaller ...
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Unusual Behaviour of Dickey-Fuller Tests in the Presence of Trend Misspecification: Comment
... Thus, when the number of the initial observations that are discarded is rather small, the τ τ -test exhibits very unusual behaviour. For the range of values of the autoregressive parameter that are considerably smaller ...
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ASSESSING INSTABILITY IN TRANSITION COUNTRIES USING PERRON’S MODIFIED AUGMENTED DICKEY-FULLER TEST
... More precisely, they argued that shocks are important over decade-long periods, especially for developing countries which are more prone to shocks, since they influence “policy” variables and thus estimates of the impact ...
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Finite sample effects of pure seasonal mean shifts on Dickey Fuller tests
... Keywords: unit roots; seasonality; Dickey-Fuller tests; structural breaks. JEL Classification: C22, C52 ∗ I am grateful to Ann Henshall for helpful comments and suggestions. Financial support ...
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On the finite-sample power of modified Dickey-Fuller tests: The role of the initial condition
... modified tests is ...of unit root tests, the results presented allow practitioners to select, and interpret the results of, alternative unit root tests in light of the ...
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New Fractional Dickey and Fuller Test
... of Dickey and Fuller (1979) on formal tests for unit roots, these tests became standard in applied time series analysis and ...the Dickey-Fuller type test by taking into ...
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Time Series Analysis Using SAS R Part I The Augmented Dickey-Fuller (ADF) Test
... of x) is the dependent variable and the independent variables are the set of 5 previous-differenced values of the x series. This analysis provides a "best-fit" mathematical equation for the relationship exhibited in Eq ...
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Bootstrap Unit Root Tests
... the Dickey-Fuller unit root tests for the fi- nite order autoregressive unit root models driven by iid errors, possibly with constant and linear time ...other unit ...
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Seasonal Unit Root Tests: A Comparison
... Seasonal Unit Root Tests: A ...A. Dickey and ...seasonal unit root tests: the DHF test introduced by Dickey et al (1984), the HEGY test proposed by Hylleberg et ...
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Detrending Bootstrap Unit Root Tests
... of unit root testing, that is how to deal with deterministic ...bootstrap unit root tests in univariate time ...have tests that can take such trends into ...the unit ...
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