Summary statistics for a8_c2_33 variable in hosp_rollup2552_96_2005 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a8_c2_33 | 454 -1150058 1572987 -1.05e+07 -1903 by Jean Roth , jroth@nber.org , 21 Apr 2018