Before revision:  We show in simulations that,  for important classes of networks lacking low-conductance clusters, cluster-robust methods can exhibit substantial size distortion , whereas for networks with such clusters, they outperform HAC estimators .
After revision:  We find in simulations that, for important classes of networks lacking low-conductance clusters, cluster-robust methods can exhibit substantial size distortion , whereas for networks with such clusters, they outperform HAC estimators .