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arXiv 2102.01291econ.EMmath.STstat.TH
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交错推广设计的高效估计

Efficient Estimation for Staggered Rollout Designs

Jonathan Roth, Pedro H. C. Sant'Anna

AI总结:

研究交错推广设计中的因果效应估计,推导出包含多种广义双重差分方法的最有效估计量,其可行插件版本渐近无偏且效率优于现有方法,并提供t检验和置换检验推断方法,实际应用中置信区间显著缩短。

摘要:

我们研究交错推广设计中的因果效应估计,即存在交错处理采用且处理时间几乎随机分配的场景。我们推导出一类包含多种流行广义双重差分方法的估计量中的最有效估计量。该有效估计量的可行插件版本渐近无偏,且其效率(弱)优于现有方法。我们提供了基于t检验和基于置换检验的推断方法。在应用于警察培训项目时,所提估计量的置信区间比现有方法最多缩短了八倍。

英文摘要:

We study estimation of causal effects in staggered rollout designs, i.e. settings where there is staggered treatment adoption and the timing of treatment is as-good-as randomly assigned. We derive the most efficient estimator in a class of estimators that nests several popular generalized difference-in-differences methods. A feasible plug-in version of the efficient estimator is asymptotically unbiased with efficiency (weakly) dominating that of existing approaches. We provide both $t$-based and permutation-test-based methods for inference. In an application to a training program for police officers, confidence intervals for the proposed estimator are as much as eight times shorter than for existing approaches.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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