Summary statistics for b_1_c18_19 variable in snf_rollup2540_96_1997 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- b_1_c18_19 | 1,154 1146869 1820278 -133472 2.58e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018