Summary statistics for rpsr2008q4 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 37757 5964331 37943.57 5798932 6039516 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015