Summary statistics for a_c1_18 variable in snf_rollup2540_96_2000 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c1_18 | 6,729 969607.6 811855.1 -3364 1.57e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018