Summary statistics for a_c1_18 variable in hosp_rollup2552_96_1997 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c1_18 | 3,497 283564.8 622588.8 -20844 2.44e+07 by Jean Roth , jroth@nber.org , 5 Sep 2018