Summary statistics for s3_1_c13_3 variable in snf_rollup2540_96_1996 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- s3_1_c13_3 | 29 483.4014 764.1538 23.92 4079 by Jean Roth , jroth@nber.org , 17 Feb 2018