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Exact critical values of unit root tests when there is a constant term and a time trend

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  • Kazuhiro Ohtani

Abstract

Using a method proposed by Imhof in 1961 the exact distribution of the test statistics for the unit root when the AR(1) process has a constant term and a time trend is evaluated numerically. Detailed tables of the exact critical values are presented.

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  • Kazuhiro Ohtani, 1999. "Exact critical values of unit root tests when there is a constant term and a time trend," Applied Economics Letters, Taylor & Francis Journals, vol. 6(8), pages 497-500.
    • Handle: RePEc:taf:apeclt:v:6:y:1999:i:8:p:497-500
    DOI: 10.1080/135048599352808
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    1. Guilkey, David K. & Schmidt, Peter, 1989. "Extended tabulations for Dickey-Fuller tests," Economics Letters, Elsevier, vol. 31(4), pages 355-357, December.
    2. Dickey, David A & Fuller, Wayne A, 1981. "Likelihood Ratio Statistics for Autoregressive Time Series with a Unit Root," Econometrica, Econometric Society, vol. 49(4), pages 1057-1072, June.
    3. Evans, G B A & Savin, N E, 1984. "Testing for Unit Roots: 2," Econometrica, Econometric Society, vol. 52(5), pages 1241-1269, September.
    4. Daniela De Angelis & Stefano Fachin & G. Alastair Young, 1997. "Bootstrapping unit root tests," Applied Economics, Taylor & Francis Journals, vol. 29(9), pages 1155-1161.
    5. Evans, G B A & Savin, N E, 1981. "Testing for Unit Roots: 1," Econometrica, Econometric Society, vol. 49(3), pages 753-779, May.
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