Summary statistics for a_c6_4 variable in hosp_rollup2552_96_1998 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c6_4 | 4,317 165483.5 1191170 -7983394 2.36e+07 by Jean Roth , jroth@nber.org , 6 Sep 2018