Summary statistics for d_4_hos_c6_44 variable in hosp_rollup2552_96_2009 datase Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d_4_hos~6_44 | 311 3.29e+08 3.33e+08 141722 2.39e+09 by Jean Roth , jroth@nber.org , 21 Apr 2018