Newey, Whitney; Windmeijer, Frank - Centre for Microdata Methods and Practice (CEMMAP) - 2005
Using many moment conditions can improve efficiency but makes the usual GMM inferences inaccurate. Two step GMM is biased. Generalized empirical likelihood (GEL) has smaller bias but the usual standard errors are too small. In this paper we use alternative asymptotics, based on many weak moment...