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Feasible IV Regression without Excluded Instruments

Emmanuel Selorm Tsyawo

arXiv 17 Mar 2021 · Econometrics · publishedEconometrics Journal (2022) · 6 citations (OpenAlex)

arXiv:2103.09621 · PDF · DOI · OpenAlex · Extracted main text

Abstract

The relevance condition of Integrated Conditional Moment (ICM) estimators is significantly weaker than the conventional IV's in at least two respects: (1) consistent estimation without excluded instruments is possible, provided endogenous covariates are non-linearly mean-dependent on exogenous covariates, and (2) endogenous covariates may be uncorrelated with but mean-dependent on instruments. These remarkable properties notwithstanding, multiplicative-kernel ICM estimators suffer diminished identification strength, large bias, and severe size distortions even for a moderately sized instrument vector. This paper proposes a computationally fast linear ICM estimator that better preserves identification strength in the presence of multiple instruments and a test of the ICM relevance condition. Monte Carlo simulations demonstrate a considerably better size control in the presence of multiple instruments and a favourably competitive performance in general. An empirical example illustrates the practical usefulness of the estimator, where estimates remain plausible when no excluded instrument is used.

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appendix boundary found by appendix_titled_section at “Appendix: Proof of Theorem 3.1” · 94% of the source is main text. Read the extracted text to check this.

Most heavily cited references

The works this paper leans on most, across its whole bibliography — not restricted to papers in our corpus. Ranked by composite intensity, which combines how often a work is mentioned, how many sections mention it, and how much of that falls in the main text rather than the appendix.

ReferenceIntensityMentionsSectionsMain text
1Escanciano, J. C (2018) A simple and robust estimator for linear regression models with strictly exogenous instruments1.000214100%
2Escanciano, J. C (2006) A consistent diagnostic test for regression models using projections1.000184100%
3Antoine, B. and P. Lavergne (2014) Conditional moment models under semi-strong identification1.000154100%
4Domínguez, M. A. and I. N. Lobato (2004) Consistent estimation of models defined by conditional moment restrictions1.000114100%
5Shao, X. and J. Zhang (2014) Martingale difference correlation and its use in high-dimensional variable screening1.00063100%
6Choi, J., J. C. Escanciano, and J. Guo (2022) Generalized band spectrum estimation with an application to the new Keynesian Phillips Curve1.00053100%
7Antoine, B. and X. Sun (2022) Partially linear models with endogeneity: a conditional moment-based approach0.87452100%
8Bierens, H. J (1982) Consistent model specification tests0.84333100%
9Kim, I., S. Balakrishnan, and L. Wasserman (2020) Robust multivariate nonparametric tests via projection averaging0.73732100%
10Su, L. and X. Zheng (2017) A martingale-difference-divergence-based test for specification0.73732100%

Showing the top 10 of 69 scored citations.

Cited by, within the corpus

arXiv econ.EM papers that cite this one, ranked by how heavily they lean on it.

Citing paperIntensityMentionsSections
1A Distance Covariance-based Estimator1.00064
2Estimation for conditional moment models based on martingale difference divergence0.87462
3Distributional Instruments: Identification and Estimation with Quantile Least Squares0.64441
4Relaxing Instrument Exogeneity with Common Confounders0.64422
5A Consistent ICM-based $^2$ Specification Test0.51121
61420 Identification with possibly invalid IVs0.40511
71820 Don't (fully) exclude me, it's not necessary! Causal inference with semi-IVs0.00011