Summary statistics for rpsr2018q4 dataset : by Jean Roth , jroth@nber.org , 7 Mar 2019 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- primaryid | 21,075 1.56e+08 1149972 1.51e+08 1.59e+08 caseid | 21,075 1.56e+07 114997.2 1.51e+07 1.59e+07 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 7 Mar 2019