Summary statistics for b_1_c18_19 variable in snf_rollup2540_96_2002 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- b_1_c18_19 | 1,332 1392982 1969608 -11390 1.56e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018