Summary statistics for rpsr2015q2 dataset : by Jean Roth , jroth@nber.org , 6 Apr 2017 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- primaryid | 20,478 1.11e+08 2.19e+07 3.70e+07 1.04e+09 caseid | 20,478 1.11e+07 371858.3 3700241 1.13e+07 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 6 Apr 2017