Summary statistics for asc_bgn_srvc_dt variable in pos2018 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
asc_bgn_sr~t |      8,330    2.00e+07    96044.64   1.89e+07   2.02e+07

by Jean Roth , jroth@nber.org , 15 Feb 2019