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A solution to the problem of too many instruments in dynamic panel data GMM

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  • Mehrhoff, Jens

Abstract

The well-known problem of too many instruments in dynamic panel data GMM is dealt with in detail in Roodman (2009, Oxford Bull. Econ. Statist.). The present paper goes one step further by providing a solution to this problem: factorisation of the standard instrument set is shown to be a valid transformation for ensuring consistency of GMM. Monte Carlo simulations show that this new estimation technique outperforms other possible transformations by having a lower bias and RMSE as well as greater robustness of overidentifying restrictions. The researcher's choice of a particular transformation can be replaced by a data-driven statistical decision.

Suggested Citation

  • Mehrhoff, Jens, 2009. "A solution to the problem of too many instruments in dynamic panel data GMM," Discussion Paper Series 1: Economic Studies 2009,31, Deutsche Bundesbank.
    • Handle: RePEc:zbw:bubdp1:200931
    as

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    File URL: https://www.econstor.eu/bitstream/10419/28620/1/612354555.pdf
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    References listed on IDEAS

    as
    1. Douglas Staiger & James H. Stock, 1997. "Instrumental Variables Regression with Weak Instruments," Econometrica, Econometric Society, vol. 65(3), pages 557-586, May.
    2. David Roodman, 2009. "A Note on the Theme of Too Many Instruments," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 71(1), pages 135-158, February.
    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    Dynamic panel data; generalised method of moments; instrument proliferation; factor analysis;
    All these keywords.

    JEL classification:

    • C13 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Estimation: General
    • C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Statistical Simulation Methods: General
    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models
    • C81 - Mathematical and Quantitative Methods - - Data Collection and Data Estimation Methodology; Computer Programs - - - Methodology for Collecting, Estimating, and Organizing Microeconomic Data; Data Access

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