Summary statistics for b_1_c18_18 variable in snf_rollup2540_96_1996 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- b_1_c18_18 | 7,366 2528707 1722085 -900 2.61e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018