Summary statistics for a_c2_22 variable in hosp_rollup2552_96_2008 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c2_22 | 497 3463794 6496410 -1.00e+07 4.05e+07 by Jean Roth , jroth@nber.org , 21 Apr 2018