The factor analytical approach in trending near unit root panels

Joakim Westerlund, Milda Norkutė and Ovidijus Stauskas

Journal of Time Series Analysis, 2022, vol. 43, issue 3, 501-508

Abstract: In this study, we revisit the factor analytical (FA) approach for (near unit root) dynamic panel data models, whose asymptotic distribution has been shown to be normal and well centered at zero without the need for valid instruments or correction for bias. It is therefore very appealing. The question is: Does the appeal of FA, which so far has only been documented for fixed effects panels, extends to panels with incidental trends? This is an important question, because many persistent variables are trending. The answer turns out to be negative. In particular, while consistent, the asymptotic normality of FA breaks down when there is an exact unit root present, which limits its applicability.

Date: 2022
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https://doi.org/10.1111/jtsa.12624

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Working Paper: The Factor Analytical Approach in Trending Near Unit Root Panels (2021)
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