Summary statistics for rpsr2004q4 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 73128 4510096 23815.19 4391150 4601412 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015