Summary statistics for b_1_c18_19 variable in snf_rollup2540_96_1996 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- b_1_c18_19 | 931 1206279 1891970 -1337 2.68e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018