Distribution of retention probabilities for nuclear star clusters (red curves) and globular clusters (blue curves, inset) obtained from the informative events of GWTC-2. The distribution is obtained by binning the data in Table 1. With uninformed priors (solid curves) 90% of the events have retention probability between 0.121–0.287 (0.006–0.056) for nuclear (globular) clusters. With population-informed priors (dashed curves), 90% of the events have a retention probability between 0.304–0.514 (0.016–0.102) for nuclear (globular) clusters.