Estimating causal effects of air quality regulations using principal stratification for spatially correlated multivariate intermediate outcomes
Biostatistics (2012) - Comments
pubmed: 22267524  doi: 10.1093/biostatistics/kxr052  issn: 1468-4357  issn: 1465-4644 

Corwin M. Zigler, Francesca Dominici, Yun Wang