Newey, Whitney K.; Windmeijer, Frank - 2008
Using many moment conditions can improve efficiency but makes the usual generalized method of moments (GMM) inferences … inaccurate. Two-step GMM is biased. Generalized empirical likelihood (GEL) has smaller bias, but the usual standard errors are … under many weak moments. In addition, we introduce a jackknife GMM estimator, but find that GEL is asymptotically more …