Summary statistics for a_c2_22 variable in hosp_rollup2552_96_1997 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c2_22 | 461 1721029 4249905 -1.21e+07 5.62e+07 by Jean Roth , jroth@nber.org , 5 Sep 2018