Summary statistics for rpsr2012q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 44445 8196848 102482.7 7810716 8406255 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015