Robustify and tighten the Lee bounds: a sample selection model under stochastic monotonicity and symmetry assumptions
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| Název: | Robustify and tighten the Lee bounds: a sample selection model under stochastic monotonicity and symmetry assumptions |
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| Autoři: | Okamoto, Yuta |
| Zdroj: | The Econometrics Journal. 28:482-501 |
| Publication Status: | Preprint |
| Informace o vydavateli: | Oxford University Press (OUP), 2025. |
| Rok vydání: | 2025 |
| Témata: | FOS: Economics and business, Econometrics (econ.EM), Economics - Econometrics |
| Popis: | Summary In the presence of sample selection, Lee’s (2009, Review of Economic Studies 76, 1071–102) non-parametric bounds are a popular tool for estimating a treatment effect. However, the Lee bounds rely on the monotonicity assumption, the empirical validity of which is sometimes unclear. Furthermore, the bounds are often regarded to be wide and less informative even under monotonicity. To address these issues, this study introduces a stochastic version of the monotonicity assumption alongside a non-parametric distributional shape constraint. The former enhances the robustness of the Lee bounds with respect to monotonicity, while the latter helps tighten these bounds. The obtained bounds do not rely on the exclusion restriction and can be root-n consistently estimable, making them practically viable. The potential usefulness of the proposed methods is illustrated by their application to experimental data from an after-school instruction programme. |
| Druh dokumentu: | Article |
| Jazyk: | English |
| ISSN: | 1368-423X 1368-4221 |
| DOI: | 10.1093/ectj/utaf001 |
| DOI: | 10.48550/arxiv.2311.00439 |
| Přístupová URL adresa: | http://arxiv.org/abs/2311.00439 |
| Rights: | OUP Standard Publication Reuse arXiv Non-Exclusive Distribution |
| Přístupové číslo: | edsair.doi.dedup.....a2bc6f814f21ea3ec95d5c19efdbfd1f |
| Databáze: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstrakt: | Summary In the presence of sample selection, Lee’s (2009, Review of Economic Studies 76, 1071–102) non-parametric bounds are a popular tool for estimating a treatment effect. However, the Lee bounds rely on the monotonicity assumption, the empirical validity of which is sometimes unclear. Furthermore, the bounds are often regarded to be wide and less informative even under monotonicity. To address these issues, this study introduces a stochastic version of the monotonicity assumption alongside a non-parametric distributional shape constraint. The former enhances the robustness of the Lee bounds with respect to monotonicity, while the latter helps tighten these bounds. The obtained bounds do not rely on the exclusion restriction and can be root-n consistently estimable, making them practically viable. The potential usefulness of the proposed methods is illustrated by their application to experimental data from an after-school instruction programme. |
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| ISSN: | 1368423X 13684221 |
| DOI: | 10.1093/ectj/utaf001 |