Summary statistics for a_c2_2 variable in snf_rollup2540_96_2002 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c2_2 | 6,898 78044.35 216358.9 -8721 1.43e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018