Detecting invalid instruments using L1-GMM

Chirok Han

Economics Letters, 2008, vol. 101, issue 3, 285-287

Abstract: In this paper we propose a simple L1-GMM consistent estimator for linear structural equations models when some instruments are invalid. A simple method to detect invalid instruments is also proposed.

Keywords: Instrumental; variables; Invalid; instruments; L1-GMM; Over-identification; test (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecolet:v:101:y:2008:i:3:p:285-287

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