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econ.EM2026
Counterexamples and Sufficient Conditions: Comments on "Optimally-Transported Generalized Method of Moments"
Masahiro Kato
We comment on the optimally-transported generalized method of moments (OTGMM) estimator proposed by Schennach & Starck (2026a) and give counterexamples to Theorems 2-6 under their…
econ.EM2026
ScoreMatchingRiesz: Score Matching for Debiased Machine Learning and Policy Path Estimation
Masahiro Kato
We propose ScoreMatchingRiesz, a family of Riesz representer estimators based on score matching. The Riesz representer is a key nuisance component in debiased machine learning, ena…
econ.EM2024
A Note on Doubly Robust Estimator in Regression Discontinuity Designs
Masahiro Kato
This note introduces a doubly robust (DR) estimator for regression discontinuity (RD) designs. RD designs provide a quasi-experimental framework for estimating treatment effects, w…