Testing for Panel Unit Roots in the Presence of Spatial Dependency

Kristofer Månsson (), Ghazi Shukur and Pär Sjölander

No 71, HUI Working Papers from HUI Research

Abstract: In this the size and power properties of the common factor Im, Pesaran and Shin (CIPS), Wald (W), likelihood ratio (LR) and Lagrange multiplier (LM) tests are investigated when the error term follows a spatial error model. The results from the Monte Carlo simulations used in this study, firstly show that the CIPS test over-estimates the nominal size. Secondly, the simulated results shows that the empirical size of the W test approaches the nominal size quickly while the LR and LM tests underestimates the null hypothesis in both small and moderate sample sizes. Finally, the results also show that even though the LM and LR test under-reject the true null hypothesis they have higher power than the W test.

Keywords: Panel data; unit root tests; spatial dependency; Monte Carlo simulations (search for similar items in EconPapers)
JEL-codes: C40 (search for similar items in EconPapers)
Pages: 16 pages
Date: 2012-10-31
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Journal Article: Testing for panel unit roots in the presence of spatial dependency (2013)
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