Panel Unit Root Tests and Spatial Dependence
Center for Policy Research Working Paper No. 88
37 Pages Posted: 20 Apr 2011
Date Written: December 1, 2006
This paper studies the performance of panel unit root tests when spatial effects are present that account for cross-section correlation. Monte Carlo simulations show that there can be considerable size distortions in panel unit root tests when the true specification exhibits spatial error correlation. These tests are applied to a panel data set on net real income from the 1000 largest French communes observed over the period 1985-1998.
Keywords: Nonstationarity, Panel Data, Spatial Dependence, Cross-Section Correlation, Unit Root tests
JEL Classification: C23
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