Summary statistics for d4_hos_c2_39 variable in hosp_rollup2552_96_1997 dataset Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d4_hos_c2_39 | 1,971 16969.82 169234.6 -111541 4114990 by Jean Roth , jroth@nber.org , 5 Sep 2018