Summary statistics for b_1_c18_23 variable in snf_rollup2540_96_2009 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- b_1_c18_23 | 4,456 34077.64 48425.25 -2861 576705 by Jean Roth , jroth@nber.org , 17 Feb 2018