Summary statistics for d4_hos_c2_30 variable in hosp_rollup2552_96_2008 dataset Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d4_hos_c2_30 | 104 1.17e+07 4.12e+07 256 3.89e+08 by Jean Roth , jroth@nber.org , 21 Apr 2018