Estimating treatment-effect heterogeneity across sites, in multi-site randomized experiments with few units per site
每个站点样本较少的多站点随机实验中治疗效应异质性的估计
Multi-site randomized experiments, which are common in economics and medicine, can reveal how treatment effects vary across settings. However, differences between site-specific estimates reflect both treatment-effect heterogeneity and estimation noise. We build on established measurement-error corrections and develop new ones to study this heterogeneity in experiments with many sites and few units per site. In particular, our results can be used to estimate the variance and…