Regression modelUnit-root test
Panel DF-GLS
Panel DF-GLS extends the Elliott, Rothenberg, and Stock (1996) GLS unit-root test to panel data, combining cross-sectional and time-series information to test whether variables contain unit roots. Introduced by Hadri and colleagues (2005), it is more powerful than standard panel unit-root tests (IPS, LLC) due to its GLS detrending approach. This test is essential for establishing stationarity before fitting cointegration or dynamic panel models.
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Sources
- Elliott, G., Rothenberg, T. J., & Stock, J. H. (1996). Efficient tests for an autoregressive unit root. Econometric Reviews, 13(4), 469-497. DOI: 10.1080/07474938.2012.690563 ↗
- Hadri, K., & Larsson, R. (2005). Testing for stationarity in heterogeneous panel data. Econometric Reviews, 24(4), 403-456. DOI: 10.1080/07474930500243019 ↗