Distribution of logAge differences between this study (in black) and the studies by Bossini et al. (2019) (in blue), Dias et al. (2019) (in orange), and Cantat-Gaudin et al. (2020) (in purple). The distributions are obtained via a KDE, using Scott’s rule (Scott 1979) to determine the bandwidth. The bottom three panels show the distribution of logAge differences for the remaining surveys against the other three, respectively. Using this comparison, we find no systematic differences in estimated ages across the four presented methods.