Summary statistics for rpsr2010q4 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 33217 7144752 66513.05 6840109 7301355 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015