A similar performance was observed in our simulations to that of Pan’s, in terms of coverage probabilities, for the Liang-Zeger and Pan sandwich estimators under both the independence and compound symmetry structures [5]. The results of Gunsolley et al.’s 1995 simulation study exploring the performance of the Liang-Zeger sandwich estimator were similar to ours: as the outcome prevalence or sample size increased, the performance of the Liang-Zeger improved, as well in terms of Type I error rates [7].
