Summary statistics for a7_3_c9_4 variable in hosp_rollup2552_96_1998 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a7_3_c9_4 | 5,378 1603429 2741176 -5309559 3.84e+07 by Jean Roth , jroth@nber.org , 6 Sep 2018