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Sponsored Artificial Intelligence: A Modern Approach, Global Edition Artificial Intelligence: A Modern Approach, Global Edition

Author

Mahrad Sharifvaghefi

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Preprint Sep 2026

Continuously Updating GMM in Linear IV Models: A Polynomial Approach

This paper characterizes the global minimum of the continuously updating generalized method of moments (CU-GMM) objective in linear instrumental variables models. We allow optimal weighting matrices under heteroskedasticity, autocorrelation, or clustering. We show that the objective is a ratio of polynomials. For one e...

Marcelo J. Moreira, W. Newey, Mahrad Sharifvaghefi · 0 citations

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