Sharp Bounds for Continuous-Valued Treatment Effects with Unobserved Confounders
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909853612507136 |
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| author | Baitairian, Jean-Baptiste Sebastien, Bernard Jreich, Rana Katsahian, Sandrine Guilloux, Agathe |
| author_facet | Baitairian, Jean-Baptiste Sebastien, Bernard Jreich, Rana Katsahian, Sandrine Guilloux, Agathe |
| contents | In causal inference, treatment effects are typically estimated under the ignorability, or unconfoundedness, assumption, which is often unrealistic in observational data. By relaxing this assumption and conducting a sensitivity analysis, we introduce novel bounds and derive confidence intervals for the Average Potential Outcome (APO) - a standard metric for evaluating continuous-valued treatment or exposure effects. We demonstrate that these bounds are sharp under a continuous sensitivity model, in the sense that they give the smallest possible interval under this model, and propose a doubly robust version of our estimators. In a comparative analysis with the method of Jesson et al. (2022) (arXiv:2204.10022), using both simulated and real datasets, we show that our approach not only yields sharper bounds but also achieves good coverage of the true APO, with significantly reduced computation times. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_02231 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sharp Bounds for Continuous-Valued Treatment Effects with Unobserved Confounders Baitairian, Jean-Baptiste Sebastien, Bernard Jreich, Rana Katsahian, Sandrine Guilloux, Agathe Methodology In causal inference, treatment effects are typically estimated under the ignorability, or unconfoundedness, assumption, which is often unrealistic in observational data. By relaxing this assumption and conducting a sensitivity analysis, we introduce novel bounds and derive confidence intervals for the Average Potential Outcome (APO) - a standard metric for evaluating continuous-valued treatment or exposure effects. We demonstrate that these bounds are sharp under a continuous sensitivity model, in the sense that they give the smallest possible interval under this model, and propose a doubly robust version of our estimators. In a comparative analysis with the method of Jesson et al. (2022) (arXiv:2204.10022), using both simulated and real datasets, we show that our approach not only yields sharper bounds but also achieves good coverage of the true APO, with significantly reduced computation times. |
| title | Sharp Bounds for Continuous-Valued Treatment Effects with Unobserved Confounders |
| topic | Methodology |
| url | https://arxiv.org/abs/2411.02231 |