Summary statistics for d_4_irf_c11_67 variable in prds_hosp10_yr2011 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- d_4_irf~1_67 | 12 9677.5 11259.69 1269 38500 by Jean Roth , jroth@nber.org , 24 Aug 2018