Summary statistics for aabb_acrdtd_y_match_dt variable in posclia2012 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- aabb_acrdt~t | 262 2.00e+07 57893.64 1.99e+07 2.01e+07 by Jean Roth , jroth@nber.org , 26 Jan 2016