Summary statistics for b_1_c18_18 variable in snf_rollup2540_96_2002 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- b_1_c18_18 | 4,387 2909816 2573124 -66850 5.23e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018