The Asymptotic Properties of GMM and Indirect Inference Under Second-Order Identification

Prosper Dovonon and Alastair R. Hall

Economics Discussion Paper Series from Economics, The University of Manchester

Abstract: This paper presents a limiting distribution theory for GMM and Indirect Inference estimators when first-order identification fails but the parameters are second-order identified. These limit distributions are shown to be non-standard, but we show that they can be easily simulated, making it possible to perform inference about the parameters in this setting. We illustrate our results in the context of a dynamic panel data model in which the parameter of interest is identified locally at second order by non-linear moment restrictions but not at first order at a particular point in the parameter space. Our simulation results indicate that our theory leads to reliable inferences in moderate to large samples in the neighbourhood of this point of first-order identification failure. In contrast, inferences based on standard asymptotic theory (derived under the assumption of firstorder local identification) are very misleading in the neighbourhood of the point of first-order local identification failure.

Date: 2017
New Economics Papers: this item is included in nep-ecm
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Persistent link: https://EconPapers.repec.org/RePEc:man:sespap:1705

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