Summary statistics for rpsr2010q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 35987 6603679 39771.52 6394242 6681977 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015