Alternative over-identifying restriction test in the GMM estimation of panel data models

Kazuhiko Hayakawa

Econometrics and Statistics, 2019, vol. 10, issue C, 71-95

Abstract: A new over-identifying restriction test in the generalized method of moments (GMM) estimation of panel data models is proposed. In contrast to the conventional over-identifying restriction test, where the sample covariance matrix of the moment conditions is used in the weighting matrix, the proposed test uses a block diagonal weighting matrix constructed from the efficient optimal weighting matrix. It is shown that the proposed test statistic asymptotically follows the weighted sum of the chi-square distribution with one degree of freedom. A detailed local power analysis is provided for dynamic panel data models, and it is demonstrated that the new test has a comparable power to the conventional J test in many cases. The Monte Carlo simulations reveal that the proposed test has a substantially better size property than the conventional test does.

Keywords: Panel data; GMM; Over-identification test; System of equations (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecosta:v:10:y:2019:i:c:p:71-95

DOI: 10.1016/j.ecosta.2018.06.002

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