Dickey-Fuller unit root test
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 ...
9
New Fractional Dickey and Fuller Test
... Diebold and Rudebush (1991) showed, by Monte Carlo simulations, that this test has quite low power and can lead to the incorrect conclusion that a time series has a unit root also when this is not ...
7
On infimum Dickey–Fuller unit root tests allowing for a trend break under the null
... employ unit root tests which allow for such ...the test has an asymptotic size of unity when a break in trend is present under the unit root null ...
10
On the use of integer and fractional flexible Fourier form Dickey-Fuller unit root tests
... In the second alternative method we adjust the critical values according to the estimated frequency as recommended in Enders and Lee (2012b) and Omay (2015). However, unlike the previous authors, instead of exogenously ...
37
Optimal Fractional Dickey-Fuller Tests for Unit Roots
... fractional Dickey-Fuller (hereinafter, FDF) test for testing the null of unit root against the alternative of fractional ...FDF test can equal or outperform the finite sample ...
30
Covariate Augmented Dickey-Fuller Tests with R
... a test greatly increases the chances that the test is effectively used by ...the test procedure requires the use of non-standard tables available only in few specialized ...panel unit ...
16
Income convergence: the Dickey Fuller test under the simultaneous presence of stochastic and deterministic trends
... the Dickey-Fuller (DF) test as a tool to examine the convergence ...this test is useful when the intention is to discriminate between a unit root process and a trend stationary ...
9
ASSESSING INSTABILITY IN TRANSITION COUNTRIES USING PERRON’S MODIFIED AUGMENTED DICKEY-FULLER TEST
... the unit root null was rejected for 20 countries in their ...the test in first differences for the series in which a unit root could not be ...
20
Income Convergence: The Dickey-Fuller Test under the Simultaneous Presence of Stochastic and Deterministic Trends
... DF test have found it difficult to reject the null hypothesis of unit root (see, for example, Carlino and Mills (1993), Oxley and Greasley (1995), Loewy and Papell (1996), Li and Papell (1999), and ...
8
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 ...
6
Dickey-Fuller Type of Tests against Nonlinear Dynamic Models
... several test statistics of testing the null hypothe- ses of a random walk (with or without drift) against models that accommodate a smooth nonlinear shift in the level, the dynamic structure, and the ...classical ...
38
Inconsistency of a Unit Root Test against Stochastic Unit Root Processes
... X t 2 −1 ¢ −1 P X t X t −1 , namely, b ϕ n is the OLS estimator for ϕ under the null hypoth- esis of σ ϕ 2 = 0. We consider the two well–known DF–UR tests, which are proposed by Dickey and Fuller (1979). ...
13
A bootstrap view on dickey-fuller control charts for AR(1) series
... and Dickey-Fuller type detection procedures Let us consider an autoregressive time series model of order 1, AR(1), given by Y t+1 = ρY t + u t , t ≥ 1, (1) where {u t } are independent and identically ...
14
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 ...
8
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 ...
10
On the finite-sample power of modified Dickey-Fuller tests: The role of the initial condition
... detrended Dickey-Fuller test To increase the power of the τ µ test, Elliott et ...resulting test of the unit root hypothesis, denoted as τ GLS µ , is then given as the ...
10
Testing for unit roots under multiple possible trend breaks and non stationary volatility using bootstrap minimum Dickey Fuller statistics
... (2013) test, this approach having proved to be highly successful in other unit root testing ...bootstrap unit root tests perform well in …nite samples avoiding the large over-size ...
32
Residual Augmented Fourier ADF Unit Root Test
... residual-based unit root test in the presence of smooth structural changes approximated by a Fourier ...Augmented Dickey Fuller test that introduced by Enders and Lee (2012a) ...
16
A New Nonlinear Unit Root Test with Fourier Function
... use unit root ...variables. Unit root tests were first introduced to literature by Dickey and Fuller ...traditional unit root tests will display a tendency not to ...
10
Detecting Stationarity of GDP:A Test of Unit Root Tests
... on unit roots, consensus on several important issues and implications has not emerged to date (Libanio, ...of unit root and for these series, there is conflict between the researchers regarding the ...
31