Summary statistics for d_4_hos_c2_56 variable in hosp_rollup2552_96_2009 datase Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d_4_hos~2_56 | 312 407731.1 454279.1 466 2984732 by Jean Roth , jroth@nber.org , 21 Apr 2018