Summary statistics for a_c6_97 variable in hosp_rollup2552_96_2007 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_c6_97 | 168 1865214 1.59e+07 -3.57e+07 1.84e+08 by Jean Roth , jroth@nber.org , 21 Apr 2018