A growing number of methods aim to assess the challenging question of treatment effect variation in observational studies. This special section of Observational Studies reports the results of a workshop conducted at the 2018 Atlantic Causal Inference Conference designed to understand the similarities and differences across these methods. Eight groups of researchers participated in the workshop and analyzed a synthetic observational data set that was generated using a recent large-scale randomized trial in education. Each group contributed an article in this section.
September 9, 2019