1. Asymptotic Efficiency of Semiparametric Two-step GMM. (14th April 2014) Authors: Ackerberg, Daniel; Chen, Xiaohong; Hahn, Jinyong; Liao, Zhipeng Journal: Review of economic studies Issue: Volume 81:Number 3(2014:Jul.) Page Start: 919 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗