Ai, Chunrong; Linton, Oliver; Motegi, Kaiji; Zhang, Zheng - 2019
framework includes the average, quantile and asymmetric least squares causal effect of treatment as special cases. For this … general framework, we first derive the semiparametric efficiency bound for the causal effect of treatment, extending the … existing bound results to a wider class of models. We then propose a generalized optimization estimator for the causal effect …