Summary statistics for d_4_hos_c6_56 variable in hosp_rollup2552_96_2006 datase Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d_4_hos~6_56 | 109 2.31e+07 2.16e+07 1102 8.88e+07 by Jean Roth , jroth@nber.org , 21 Apr 2018