Summary statistics for b_1_c18_19 variable in snf_rollup2540_96_1998 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- b_1_c18_19 | 1,248 1240595 1869497 -506 2.74e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018