Summary statistics for a_c6_18 variable in hosp_rollup2552_96_2009 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c6_18 | 840 -166295.2 2285033 -6.13e+07 1.28e+07 by Jean Roth , jroth@nber.org , 21 Apr 2018