Summary statistics for c_1_c7_99 variable in prds_hosp10_yr2011 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- c_1_c7_99 | 4 1.64e+07 2.17e+07 3316339 4.89e+07 by Jean Roth , jroth@nber.org , 24 Aug 2018