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Improved JIVE Estimators for Overidentified Linear Models with and without Heteroskedasticity

Daniel Ackerberg () and Paul Devereux ()

No 6926, CEPR Discussion Papers from C.E.P.R. Discussion Papers

Abstract: We introduce two simple new variants of the Jackknife Instrumental Variables (JIVE) estimator for overidentified linear models and show that they are superior to the existing JIVE estimator, significantly improving on its small sample bias properties. We also compare our new estimators to existing Nagar (1959) type estimators. We show that, in models with heteroskedasticity, our estimators have superior properties to both the Nagar estimator and the related B2SLS estimator suggested in Donald and Newey (2001). These theoretical results are verified in a set of Monte-Carlo experiments and then applied to estimating the returns to schooling using actual data.

Keywords: JIVE; weak instruments (search for similar items in EconPapers)
JEL-codes: L24 L40 O31 O34 (search for similar items in EconPapers)
Date: 2008-08
New Economics Papers: this item is included in nep-ecm
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Journal Article: Improved JIVE Estimators for Overidentified Linear Models with and without Heteroskedasticity (2009) Downloads
Working Paper: Improved Jive estimators for overidentified linear models with and without heteroskedasticity (2008) Downloads
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