Summary statistics for drug2010q3 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |         0
    drug_seq |         0
    role_cod |         0
    drugname |         0
     val_vbm |    794686    1.243807    .4293779          1          2
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      3647    2.01e+07    166581.4   1.97e+07   3.01e+07
  exp_dt_num |      3647    18971.15    6082.138       4473     384675
     nda_num |    205408    23768.57    12126.93          1     201023

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