Summary statistics for a_c6_5 variable in snf_rollup2540_96_2005 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c6_5 | 4,574 -14712.89 216913.2 -1.19e+07 3315934 by Jean Roth , jroth@nber.org , 17 Feb 2018