Summary statistics for d_4_hos_c6_56 variable in hosp_rollup2552_96_1999 datase Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d_4_hos~6_56 | 20 1.09e+07 1.02e+07 1324812 4.54e+07 by Jean Roth , jroth@nber.org , 7 Sep 2018