Summary statistics for a_c6_4 variable in hosp_rollup2552_96_1997 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c6_4 | 4,403 127469.1 1143565 -3.49e+07 2.25e+07 by Jean Roth , jroth@nber.org , 5 Sep 2018