Summary statistics for a_c6_1 variable in snf_rollup2540_96_2009 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c6_1 | 10,860 -72786.81 418823.5 -1.09e+07 1.09e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018