Summary statistics for rpsr2008q2 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 43383 5743205 34471.62 5583986 5829489 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015