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Conformal Prediction for Nonparametric Instrumental Regression

Masahiro Kato

arXiv 26 Mar 2026 · Econometrics

arXiv:2603.25509 · PDF · DOI · OpenAlex · Extracted main text

Abstract

We propose a method for constructing distribution-free prediction intervals in nonparametric instrumental variable regression (NPIV), with finite-sample coverage guarantees. Building on the conditional guarantee framework in conformal inference, we reformulate conditional coverage as marginal coverage over a class of IV shifts $\mathcal{F}$. Our method can be combined with any NPIV estimator, including sieve 2SLS and other machine-learning-based NPIV methods such as neural networks minimax approaches. Our theoretical analysis establishes distribution-free, finite-sample coverage over a practitioner-chosen class of IV shifts.

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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
1Masahiro Kato, Masaaki Imaizumi, Kenichiro McAlinn, Shota Yasui, and… (2022) Learning causal models from conditional moment restrictions by importance weighting self0.9416483%
2Rina Foygel Barber, Emmanuel J Candès, Aaditya Ramdas, and Ryan J Ti… (2020) The limits of distribution-free conditional predictive inference0.9285480%
3Jing Lei and Larry Wasserman (2013) Distribution-free prediction bands for non-parametric regression0.9285480%
4Isaac Gibbs, John J Cherian, and Emmanuel J Candès (2025) Conformal prediction with conditional guarantees0.9209578%
5Ryan J Tibshirani, Rina Foygel Barber, Emmanuel Candes, and Aaditya… (2019) Conformal prediction under covariate shift0.9098475%
6Chunrong Ai and Xiaohong Chen (2003) Efficient estimation of models with conditional moment restrictions containing unknown functions0.8434375%
7Serge Darolles, Yanqin Fan, Jean-Pierre Florens, and Eric Renault (2011) Nonparametric instrumental regression0.8434375%
8Nishanth Dikkala, Greg Lewis, Lester Mackey, and Vasilis Syrgkanis (2020) Minimax estimation of conditional moment models0.8435460%
9Whitney K. Newey and James L. Powell (2003) Instrumental variable estimation of nonparametric models0.7374275%
10Jason Hartford, Greg Lewis, Kevin Leyton-Brown, and Matt Taddy (2017) Deep IV: A flexible approach for counterfactual prediction0.6443267%

Showing the top 10 of 43 scored citations.