Summary statistics for d_4_hos_c6_61 variable in hosp_rollup2552_96_2006 datase Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d_4_hos~6_61 | 103 4770792 4653744 77 2.32e+07 by Jean Roth , jroth@nber.org , 21 Apr 2018