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Journal of Econometrics· 2026Q1

Clustering with potential multidimensionality: Inference and practice

Ruonan Xu, Luther Yap

Short summary

A new variance estimator is proposed for M-estimation that refines conservative procedures and remains valid when clustering standard errors in one or more dimensions due to sampling or assignment uncertainty.

AI-generated from the title and abstract; the full text is not read.

Key points

  • Proposes a new variance estimator for M-estimation with multidimensional clustering.
  • The estimator refines a conservative procedure to ensure validity, unlike existing methods.
  • Addresses uncertainty from sampling or assignment in clustering standard errors.
  • Provides a design-based interpretation for common empirical clustering practices.

AI-generated from the title and abstract; the full text is not read.

Abstract

We show how clustering standard errors in one or more dimensions can be justified in M-estimation when there is sampling or assignment uncertainty. Since existing procedures for variance estimation are either conservative or invalid, we propose a variance estimator that refines a conservative procedure and remains valid. We then interpret environments where clustering is frequently employed in empirical work from our design-based perspective and provide insights on their estimands and inference procedures.

The authors' abstract, as published at the source. Journal of Econometrics, 2026 · DOI ↗

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Field: Artificial Intelligence

Artificial IntelligenceComputer Science