Summary statistics for d_4_hos_c6_40 variable in hosp_rollup2552_96_2004 datase Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d_4_hos~6_40 | 66 4779853 8278435 19602 5.10e+07 by Jean Roth , jroth@nber.org , 21 Apr 2018