Summary statistics for rpsr2006q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 68942 4930012 31952.17 4799889 5008430 rpsr_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015