Summary statistics for a7_3_c9_3 variable in hosp_rollup2552_96_2007 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a7_3_c9_3 | 5,738 2700543 5487580 -1.11e+07 1.08e+08 by Jean Roth , jroth@nber.org , 21 Apr 2018