Summary statistics for drug2004q3 dataset :

by Jean Roth , jroth@nber.org , 18 Dec 2015

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    273499     4433392     25742.4    4334632    4527730
    drug_seq |    273499    1.01e+09     96107.4   1.00e+09   1.01e+09
    role_cod |         0
    drugname |         0
     val_vbm |    273499    1.255339    .4360525          1          2
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      6456    2.00e+07    41205.69   1.91e+07   2.01e+07
  exp_dt_num |      6456     16564.5     1506.99     -19998      18049
     nda_num |     41169    22902.67    11177.64       1938      89997

by Jean Roth , jroth@nber.org , 18 Dec 2015