2009
DOI: 10.1080/03610910903447833
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The Effect of Pseudo-Exogenous Instrumental Variables on Hausman Test

Abstract: This paper investigates the potential problem of 'pseudo-exogenous' instruments in regression models. We show that the performance of Hausman test is deteriorated when the instruments are asymptotically exogenous but endogenous in finite samples, through Monte Carlo simulations.

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Cited by 9 publications
(4 citation statements)
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“…In employing an instrumental variable one is able to mitigate estimation inconsistency, but estimates lose efficiency (become less accurate) and their finite‐sample bias increases. Even if the instruments are uncorrelated with the disturbances at the population level, there will be a “nuisance correlation” in any finite sample of the population, which results in a bias toward the OLS estimator (Jeong and Yoon, 2010). These nuisance correlations can be expected to be even worse with weak instruments, as small effects are subject to greater sampling variability.…”
Section: The Empirical Aspectmentioning
confidence: 99%
“…In employing an instrumental variable one is able to mitigate estimation inconsistency, but estimates lose efficiency (become less accurate) and their finite‐sample bias increases. Even if the instruments are uncorrelated with the disturbances at the population level, there will be a “nuisance correlation” in any finite sample of the population, which results in a bias toward the OLS estimator (Jeong and Yoon, 2010). These nuisance correlations can be expected to be even worse with weak instruments, as small effects are subject to greater sampling variability.…”
Section: The Empirical Aspectmentioning
confidence: 99%
“…In addition, we employ the Hausman test [12] to investigate the potential endogeneity issue within the model. The results of the test show that we do not have sufficient evidence to reject the null hypothesis, indicating the absence of an endogeneity issue.…”
Section: Diagnostic Testsmentioning
confidence: 99%
“…It is possible that a suspected endogenous variable (i.e., those are considered as endogenous based on theory and literature) can be approximately exogenous (we explain this term in details in section 3.3). In this case, OLS regression is more efficient because the widely used 2SLS estimator is naturally biased in finite samples (Cameron and Trivedi, 2005, p. 108) while the OLS estimator is not (Baum, 2006; Jeong and Yoon, 2010). If the literature and/or theory suggest that endogeneity may be a concern, endogeneity tests should be performed to examine the extent of endogeneity.…”
Section: Addressing Endogeneity: Om Literaturementioning
confidence: 99%