Summary statistics for d4_sub2_c2_56 variable in hosp_rollup2552_96_2011 datase Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d4_sub2_c2~6 | 3 393258.3 203610.7 158149 510813 by Jean Roth , jroth@nber.org , 21 Apr 2018