Summary statistics for a_c2_3 variable in snf_rollup2540_96_1999 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c2_3 | 10,911 441540.7 581931.9 -29747 1.17e+07 by Jean Roth , jroth@nber.org , 17 Feb 2018