Journal of the Korean Statistical Society

  • 제36권1호
  • /
  • Pages.149-156
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  • 2007
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  • 1226-3192(pISSN)
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  • 2005-2863(eISSN)
한국통계학회 (The Korean Statistical Society)
권호 표지

A SIGN TEST FOR UNIT ROOTS IN A SEASONAL MTAR MODEL

  • 발행 : 2007.03.31
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초록

This study suggests a new method for testing seasonal unit roots in a momentum threshold autoregressive (MTAR) process. This sign test is robust against heteroscedastic or heavy tailed errors and is invariant to monotone data transformation. The proposed test is a seasonal extension of the sign test of Park and Shin (2006). In the case of partial seasonal unit root in an MTAR model, a Monte-Carlo study shows that the proposed test has better power than the seasonal sign test developed for AR model.

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참고문헌

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