Summary statistics for aabb_acrdtd_y_match_dt variable in posclia2015 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- aabb_acrdt~t | 253 2.00e+07 66504.72 1.99e+07 2.02e+07 by Jean Roth , jroth@nber.org , 26 Jan 2016