Summary statistics for d4_hos_c2_30 variable in hosp_rollup2552_96_2004 dataset Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d4_hos_c2_30 | 95 5799725 1.29e+07 1137 9.74e+07 by Jean Roth , jroth@nber.org , 21 Apr 2018