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Of Fixed-Effects and Time-Invariant Variables

Published online by Cambridge University Press:  04 January 2017

Nathaniel Beck
Nathaniel Beck*
Affiliation:
Department of Politics, New York University, New York, NY 10012 e-mail: [email protected]
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Extract

What follows is a longish controversy (two critiques, a reply and two rejoinders) over the quality of the estimates and associated SEs provided by Plümper and Troeger's (2007) “fixed-effect vector decomposition” (FEVD) procedure; Plümper and Troeger (PT) will refer to that article and not any persons. My role is to lay out some issues that separate the authors rather than to adjudicate between them. As with many controversies, a bit of heat is generated along with some light. Readers care a bit less than the authors about what was said when, but they do care a lot about what appropriate method to use when a panel data model has both unit-specific intercepts and variables that are invariant over a unit. Thus, I also take it upon myself to discuss some things that I gleaned from this controversy; this discussion has a bit less heat than what follows, but of course readers should judge the evidence for themselves.

Type
Symposium on Fixed-Effects Vector Decomposition
Information
Political Analysis , Volume 19 , Issue 2 , Spring 2011 , pp. 119 - 122
Copyright
Copyright © The Author 2011. Published by Oxford University Press on behalf of the Society for Political Methodology 

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References

Green, Donald, Kim, Soo Yeon, and Yoon, David. 2001. Dirty pool. International Organizations 55: 441–68.Google Scholar
Hausman, Jerry A., and Taylor, William E. 1981. Panel data and unobservable individual effects. Econometrica 49: 1377–98.Google Scholar
Plümper, Thomas, and Troeger, Vera. 2007. Efficient estimation of time-invariant and rarely changing variables in finite sample panel analyses with unit fixed effects. Political Analysis 15: 124–39.Google Scholar