Summary statistics for e4_c1_45 variable in prds_hosp10_yr2010 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- e4_c1_45 | 496 8.22e+07 8.12e+07 873 6.97e+08 by Jean Roth , jroth@nber.org , 24 Aug 2018