Using different null hypotheses to test for seasonal unit roots in economic time series

Authors

  • Andreu Sansó
  • Antonio Aguirre

Keywords:

JEL: C40

Abstract

This paper tries to make a contribution by discussing the application of different testing procedures to determine the seasonal properties of quarterly data. We focus on the Hylleberg et al. and on the Canova-Hansen tests. The former detect a unit root at the zero frequency but no seasonal unit roots. The latter reveal that the series displays a statistically significant seasonal pattern with changing coefficients of some seasonal dummy variables. The CH tests finding of a seasonal unit root at frequency π does not agree with the HEGY-type test results. An explanation is given to try to interpret these two contradictory outcomes.

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Published

2002-12-30

How to Cite

Sansó, . A., & Aguirre, . A. (2002). Using different null hypotheses to test for seasonal unit roots in economic time series. Económica, 48, p. 3–26. Retrieved from https://revistas.unlp.edu.ar/Economica/article/view/8513

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Articles