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Improved JIVE Estimators for Overidentified Linear Models with and without Heteroskedasticity

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  • Ackerberg, Daniel
  • Devereux, Paul J.

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.

Suggested Citation

  • Ackerberg, Daniel & Devereux, Paul J., 2008. "Improved JIVE Estimators for Overidentified Linear Models with and without Heteroskedasticity," CEPR Discussion Papers 6926, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:6926
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    6. Daniel A. Ackerberg & Paul J. Devereux, 2006. "Comment on ‘The case against JIVE’," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 21(6), pages 835-838, September.
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    More about this item

    Keywords

    Jive; Weak instruments;

    JEL classification:

    • L24 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - Contracting Out; Joint Ventures
    • L40 - Industrial Organization - - Antitrust Issues and Policies - - - General
    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O34 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Intellectual Property and Intellectual Capital

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