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Carrion-i-Silvestre, Josep Lluís; Sansó, Andreu

Joint hypothesis specification for unit root tests with a structural break. (English) Zbl 1096.62080

Econom. J. 9, No. 2, 196-224 (2006).
Summary: Several tests based on a t-ratio have been proposed in the literature to decide the order of integration of a time series allowing for a structural break. However, another approach based on testing a joint hypothesis of unit roots and the irrelevance of some nuisance parameters is also feasible. This paper proposes new unit root tests consistent with the presence of a structural break applying this second perspective. Our approach deals both with the case where the break is not allowed under the null hypothesis, and where it is allowed. Simulations investigate the performance of this proposal compared to the existing tests and show important gains in terms of power.

Cited in 3 Documents

MSC:

62M07 Non-Markovian processes: hypothesis testing
62E20 Asymptotic distribution theory in statistics
62F05 Asymptotic properties of parametric tests
62M10 Time series, auto-correlation, regression, etc. in statistics (GARCH)

Keywords:

unit root tests; structural change; joint hypotheses; pseudo F-tests; time series; tables
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\textit{J. L. Carrion-i-Silvestre} and \textit{A. Sansó}, Econom. J. 9, No. 2, 196--224 (2006; Zbl 1096.62080)
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