Summary statistics for a_c2_2 variable in snf_rollup2540_96_2005 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c2_2 | 6,969 82173.83 300341.9 -4187 2.21e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018