Summary statistics for rpsr2005q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 69399 4585705 25937.69 4467925 4667922 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015