Summary statistics for rpsr2005q2 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 81976 4663234 27646.87 4550057 4755992 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015