Summary statistics for drug2012q3 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 |    519293    1.155945    .3628033          1          2
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      1602    2.01e+07    353598.6   2.00e+07   3.01e+07
  exp_dt_num |      1602    20133.18    12917.15      15478     385146
     nda_num |    138778    31672.27    34757.19        552     203388

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