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Efficiency In Estimation Under Monotonic Attrition

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  • Barnwell, Jean-Louis
  • Chaudhuri, Saraswata

Abstract

Attrition is monotonic when agents leaving multi-period studies do not return. Under a general missing at random (MAR) assumption, we study efficiency in estimation of parameters defined by moment restrictions on the distributions of the counterfactuals that were unrealized due to monotonic attrition. We discuss novel issues related to overidentification, usability of sample units, and the information content of various MAR assumptions for estimation of such parameters. We propose a standard doubly robust estimator for these parameters by equating to zero the sample analog of their respective efficient influence functions. Our proposed estimator performs well and vastly outperforms other estimators in our simulation experiment and empirical illustration.

Suggested Citation

  • Barnwell, Jean-Louis & Chaudhuri, Saraswata, 2025. "Efficiency In Estimation Under Monotonic Attrition," Econometric Theory, Cambridge University Press, vol. 41(6), pages 1358-1391, December.
    • Handle: RePEc:cup:etheor:v:41:y:2025:i:6:p:1358-1391_4
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