The Phantom Menace of Omitted Variables – A Comment
This note demonstrates that in applied regression analysis, the variance of a coeffi cient of interest may decrease from the inclusion of a control variable, contrasting with Clarke’s assertion (2005, 2009) that the variance can only increase or stay the same. Practitioners may thus be well-advised to include a relevant control variable on this basis alone, particularly when it is weakly correlated with the variable of interest.
|Date of creation:||Sep 2011|
|Date of revision:|
|Contact details of provider:|| Postal: |
Web page: http://www.rwi-essen.de/
More information through EDIRC
|Order Information:||Web: http://www.rwi-essen.de/publikationen/|
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Roderick J. Little & Qi Long & Xihong Lin, 2009. "A Comparison of Methods for Estimating the Causal Effect of a Treatment in Randomized Clinical Trials Subject to Noncompliance," Biometrics, The International Biometric Society, vol. 65(2), pages 640-649, 06.
- Sebastian Galiani & Paul Gertler & Ernesto Schargrodsky, 2005.
"Water for Life: The Impact of the Privatization of Water Services on Child Mortality,"
Journal of Political Economy,
University of Chicago Press, vol. 113(1), pages 83-120, February.
- Sebastian Galiani & Paul Gertler & Ernesto Schargrodsky, 2002. "Water for Life: The Impact of the Privatization of Water Services on Child Mortality," Working Papers 54, Universidad de San Andres, Departamento de Economia, revised Sep 2005.
- Kevin A. Clarke, 2005. "The Phantom Menace: Omitted Variable Bias in Econometric Research," Conflict Management and Peace Science, Peace Science Society (International), vol. 22(4), pages 341-352, September.
When requesting a correction, please mention this item's handle: RePEc:rwi:repape:0282. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Sabine Weiler)
If references are entirely missing, you can add them using this form.