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This paper demonstrates that unit root tests can suffer from inflated Type I error rates when data are cointegrated. Results from Monte Carlo simulations show that three commonly used unit root tests - the ADF, Phillips-Perron, and DF-GLS tests - frequently overreject the true null of a unit...
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In this paper, we develop new threshold cointegration tests with SETAR and MTAR adjustment allowing for the presence of … breakpoint and test the null hypothesis of no cointegration. Thereby, we extend the well-known residual-based cointegration test … Carlo experiments. We find a substantial decrease of power of the conventional threshold cointegration tests caused by a …
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Few authors have studied, either asymptotically or in finite samples, the size and power of seasonal unit root tests when the data generating process [DGP] is a non-stationary alternative aside from the seasonal random walk. In this respect, Ghysels, lee and Noh (1994) conducted a simulation...
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