Summary statistics for d4_hos_c2_30 variable in hosp_rollup2552_96_2006 dataset Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d4_hos_c2_30 | 107 5419283 1.22e+07 1345 9.33e+07 by Jean Roth , jroth@nber.org , 21 Apr 2018